{"id":75830,"date":"2022-11-22T14:10:00","date_gmt":"2022-11-22T06:10:00","guid":{"rendered":"https:\/\/blog.trendmicro.com.tw\/?p=75830"},"modified":"2022-12-22T15:18:44","modified_gmt":"2022-12-22T07:18:44","slug":"cve-2019-8561%ef%bc%9a%e9%9b%a3%e7%ba%8f%e7%9a%84-macos-packagekit-%e6%a1%86%e6%9e%b6%e6%bc%8f%e6%b4%9e","status":"publish","type":"post","link":"https:\/\/blog.trendmicro.com.tw\/?p=75830","title":{"rendered":"CVE-2019-8561\uff1a\u96e3\u7e8f\u7684 macOS PackageKit \u6846\u67b6\u6f0f\u6d1e"},"content":{"rendered":"\n

<\/h1>\n\n\n\n
\n

\u672c\u6587\u8a73\u7d30\u8aaa\u660e\u6211\u5011\u5c0d CVE-2019-8561 \u6f0f\u6d1e\u7684\u7814\u7a76\uff0c\u9019\u662f\u4e00\u500b\u5b58\u5728\u65bc macOS \u8edf\u9ad4\u5b89\u88dd\u5957\u4ef6 (PKG \u6a94\u6848) \u5b89\u88dd\u6846\u67b6\u300cPackageKit\u300d\u7576\u4e2d\u7684\u6f0f\u6d1e\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u672c\u6587\u8a73\u7d30\u8aaa\u660e\u8da8\u52e2\u79d1\u6280<\/a>\u5c0d CVE-2019-8561 \u6f0f\u6d1e\u7684\u7814\u7a76\uff0c\u9019\u662f\u4e00\u500b\u5b58\u5728\u65bc macOS \u8edf\u9ad4\u5b89\u88dd\u5957\u4ef6 (PKG \u6a94\u6848) \u5b89\u88dd\u6846\u67b6\u300cPackageKit\u300d\u7576\u4e2d\u7684\u6f0f\u6d1e\u3002\u6211\u5011\u5c07\u8a0e\u8ad6 Apple \u5982\u4f55\u4fee\u88dc\u9019\u500b\u6f0f\u6d1e\uff0c\u6f0f\u6d1e\u4fee\u88dc\u4e4b\u5f8c\u6211\u5011\u5982\u4f55\u7e7c\u7e8c\u653b\u64ca\u9019\u500b\u6f0f\u6d1e\uff0c\u4ee5\u53ca\u5f8c\u7e8c Apple \u53c8\u5982\u4f55\u518d\u6b21\u4fee\u88dc\u3002<\/p>\n\n\n\n

\u6b64\u5916\uff0c\u6211\u5011\u4e5f\u901a\u5831\u4e86\u8d85\u904e 15 \u500b\u898f\u907f Apple SIP \u6a5f\u5236\u7684\u6f0f\u6d1e\u7d66 Apple\uff0c\u5176\u4e2d\u6709\u4e9b\u6f0f\u6d1e\u6211\u5011\u66fe\u5728 Power of Community 2022 Security Conference (POC2022)<\/a> \u7814\u8a0e\u6703\u4e0a\u8a0e\u8ad6\u904e\u3002\u672c\u6587\u662f\u6211\u5011\u4e00\u7cfb\u5217\u8a0e\u8ad6 Apple SIP \u76f8\u95dc\u6f0f\u6d1e\u7684\u90e8\u843d\u683c\u4e4b\u4e00\u3002<\/p>\n\n\n\n\n\n\n\n

<\/div>\n\n\n\n

CVE-2019-8561 \u6f0f\u6d1e\u7c21\u53f2<\/h2>\n\n\n\n


2019 \u5e74 3 \u6708 25 \u65e5\uff0c\u860b\u679c\u4fee\u6b63\u4e86 CVE-2019-8561<\/a> \u6f0f\u6d1e\uff0c\u9019\u662f\u4e00\u500b\u53ef\u80fd\u8b93\u99ed\u5ba2\u63d0\u5347\u81f3\u7cfb\u7d71\u7ba1\u7406\u54e1 (root) \u6b0a\u9650\u3001\u898f\u907f\u7c3d\u7ae0\uff0c\u6700\u7d42\u898f\u907f Apple \u7cfb\u7d71\u5b8c\u6574\u6027\u4fdd\u8b77<\/a> (System Integrity Protection\uff0c\u7c21\u7a31 SIP) \u6a5f\u5236\u7684\u4e00\u500b\u6f0f\u6d1e\u3002<\/p>\n\n\n\n

\u5c31\u5728\u8a72\u6f0f\u6d1e\u63ed\u9732\u7684\u4e09\u500b\u6708\u5f8c\uff0c\u7814\u7a76\u4eba\u54e1  Jaron Bradley<\/a> \u5728\u7b2c\u4e8c\u5c46 Objective by the Sea<\/a> \u8cc7\u5b89\u7814\u8a0e\u6703\u4e0a\u8aaa\u660e\u4e86\u9019\u500b\u6f0f\u6d1e\u3002\u9019\u5834\u540d\u70ba\u300cBad Things in Small Packages<\/a>\u300d(\u58de\u4e8b\u4e0d\u5fc5\u5927) \u7684\u6f14\u8b1b\uff0c\u6fc0\u8d77\u4e86\u6211\u5011\u5c0d Apple \u5982\u4f55\u4fee\u6b63 CVE-2019-8561 \u6f0f\u6d1e\u7684\u597d\u5947\u3002\u7d93\u904e\u6df1\u5165\u7814\u7a76 PackageKit \u6846\u67b6\u4e4b\u5f8c\uff0c\u6211\u5011\u767c\u73fe Apple \u7576\u6642\u6700\u65b0\u7248\u7684\u684c\u9762\u4f5c\u696d\u7cfb\u7d71 macOS (Monterey) \u4f9d\u7136\u5b58\u5728\u8457 CVE-2019-8561 \u6f0f\u6d1e\u7684\u554f\u984c\u3002\u5c31\u50cf\u5728\u4e4b\u524d\u7684 macOS 10.14 (Mojave) \u7576\u4e2d\u4e00\u6a23\uff0c\u6b64\u6f0f\u6d1e\u53ef\u7528\u4f86\u63d0\u5347\u6b0a\u9650\u4e26\u907f\u958b SIP \u6a5f\u5236\u7684\u9650\u5236\u3002<\/p>\n\n\n\n

2022 \u5e74 10 \u6708 24 \u65e5\uff0cApple \u53c8\u518d\u6b21\u65bc macOS 13 (Ventura) \u7576\u4e2d\u89e3\u6c7a\u4e86\u9019\u500b\u554f\u984c\uff0c\u6f0f\u6d1e\u7de8\u865f\u70ba CVE-2022-32895<\/a> \u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

Apple \u7684 SIP \u6a5f\u5236  <\/h2>\n\n\n\n

SIP<\/a>  \u662f\u5f9e OS X EI Capitan \u958b\u59cb\u5c0e\u5165\u7684\u4e00\u9805\u5b89\u5168\u6a5f\u5236\uff0c\u76ee\u7684\u662f\u8981\u4fdd\u8b77 Mac \u4f5c\u696d\u7cfb\u7d71\uff0c\u9632\u6b62\u60e1\u610f\u8edf\u9ad4\u4fee\u6539\u53d7\u4fdd\u8b77\u7684\u6a94\u6848\u548c\u8cc7\u6599\u593e\u3002\u5b83\u6703\u9650\u5236 root \u4f7f\u7528\u8005\u5e33\u865f (\u56e0\u6b64\u53c8\u7a31\u70ba rootless\u6a5f\u5236) \u4e26\u9650\u5236 root \u4f7f\u7528\u8005\u53ef\u4ee5\u5c0d\u4f5c\u696d\u7cfb\u7d71\u53d7\u4fdd\u8b77\u90e8\u5206\u505a\u54ea\u4e9b\u52d5\u4f5c\u3002<\/p>\n\n\n\n

\u5728 SIP \u5c0e\u5165\u4e4b\u524d\uff0croot \u4f7f\u7528\u8005\u7684\u6b0a\u9650\u662f\u6c92\u6709\u9650\u5236\u7684\uff0c\u9019\u610f\u5473\u8457\u4ed6\u5011\u53ef\u4ee5\u5b58\u53d6\u96fb\u8166\u4e0a\u7684\u4efb\u4f55\u7cfb\u7d71\u8cc7\u6599\u593e\u6216\u61c9\u7528\u7a0b\u5f0f\u3002\u4f46\u6709\u4e86\u9019\u9805\u5b89\u5168\u6a5f\u5236\u4e4b\u5f8c\uff0c\u552f\u6709\u7d93\u904e Apple \u7c3d\u7f72\u6216\u64c1\u6709\u7279\u6b8a\u6388\u6b0a (entitlement) \u7684\u8655\u7406\u7a0b\u5e8f\u624d\u53ef\u4ee5\u4fee\u6539\u53d7\u4fdd\u8b77\u7684\u7cfb\u7d71\u6a94\u6848\uff0c\u9019\u4e9b\u8655\u7406\u7a0b\u5e8f\u5305\u62ec Apple \u8edf\u9ad4\u66f4\u65b0\u8207\u5b89\u88dd\u7a0b\u5f0f\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

system_installd<\/h2>\n\n\n\n


Mac \u4f5c\u696d\u7cfb\u7d71\u9700\u4e00\u4e9b\u7279\u6b8a\u6388\u6b0a\u624d\u80fd\u66f4\u65b0\u7cfb\u7d71\u6a94\u6848\uff0c\u4f8b\u5982\u300ccom.apple.rootless.install\u300d\u548c\u300ccom.apple.rootless.install.heritable\u300d\u9019\u5169\u500b\u6388\u6b0a\uff0c\u9019\u4e9b\u6b0a\u9650\u53ef\u91dd\u5c0d\u7279\u5b9a\u7528\u9014\u4f86\u63d0\u4f9b\u4fee\u6539\u7cfb\u7d71\u6a94\u6848\u7684\u8a31\u53ef\u3002<\/p>\n\n\n\n

\u9019\u4e9b\u7279\u6b8a\u6388\u6b0a\u53ea\u6709 Apple \u80fd\u5920\u4f7f\u7528\uff0c\u800c\u4e14\u50c5\u6709\u5c11\u6578\u7cfb\u7d71\u6307\u4ee4\u5728\u7c3d\u7f72\u6642\u64c1\u6709\u9019\u4e9b\u7279\u6b8a\u6388\u6b0a\u3002\u300csystem_installd \u300d\u5c31\u662f\u4e00\u500b\u64c1\u6709\u9019\u985e\u6388\u6b0a\u7684\u7cfb\u7d71\u80cc\u666f\u670d\u52d9\u4e4b\u4e00\uff0c\u5b83\u8ca0\u8cac\u5b89\u88dd Apple \u7c3d\u7f72\u7684\u5957\u4ef6\u3002\u8a72\u670d\u52d9\u7684\u6838\u5fc3\u908f\u8f2f\u5be6\u4f5c\u5728 PackageKit \u6846\u67b6\u7576\u4e2d\uff0c\u7531\u65bc\u5b83\u64c1\u6709 com.apple.rootless.install.heritable \u9019\u500b\u7279\u6b8a\u6388\u6b0a\uff0c\u56e0\u6b64\u5b83\u7522\u751f\u7684\u5b50\u8655\u7406\u7a0b\u5e8f\u5c31\u80fd\u5728\u4e00\u500b\u4e0d\u53d7 SIP \u9650\u5236\u7684\u74b0\u5883\u4e2d\u57f7\u884c\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

CVE-2019-8561 \u7684\u6280\u8853\u5206\u6790<\/h2>\n\n\n\n

CVE-2019-8561 \u7c21\u4ecb<\/strong><\/p>\n\n\n\n

CVE-2019-8561 \u5229\u7528\u7684\u662f Apple \u7c3d\u7f72\u7684 PKG \u6a94\u6848\u5b89\u88dd\u904e\u7a0b\u7576\u4e2d\u66b4\u9732\u7684\u7d93\u5178\u300c\u6aa2\u67e5\u6642\u9593\u8207\u4f7f\u7528\u6642\u9593\u5dee\u300d(time-of-check-to-time-of-use\uff0c\u7c21\u7a31 TOCTTOU)\u7684\u554f\u984c\u3002<\/p>\n\n\n\n

\u5716 1 \u793a\u7bc4\u5176\u653b\u64ca\u904e\u7a0b\uff1a<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n


\u5716 1\uff1aCVE-2019-8561 \u653b\u64ca\u904e\u7a0b\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

1.        \u5b89\u88dd\u4e00\u500b\u542b\u6709\u5b89\u88dd\u524d (pre-install) \u6216\u5b89\u88dd\u5f8c (post-install) \u8173\u672c\u7684 Apple \u7c3d\u7f72 PKG \u6a94\u6848\u3002<\/p>\n\n\n\n

2.        system_installd  \u80cc\u666f\u670d\u52d9\u6703\u8655\u7406\u5b89\u88dd\u8acb\u6c42\u4e26\u6aa2\u67e5\u5957\u4ef6\u7684\u7c3d\u7ae0\uff0c\u82e5\u8a72\u670d\u52d9\u5224\u65b7\u5957\u4ef6\u4e0d\u662f\u7531 Apple \u6240\u7c3d\u7f72\uff0c\u5c31\u6703\u653e\u68c4\u5b89\u88dd\u7a0b\u5e8f\u3002<\/p>\n\n\n\n

3.        \u5728\u901a\u904e\u8a72\u670d\u52d9\u7684\u9a57\u8b49\u4e4b\u5f8c\uff0c\u99ed\u5ba2\u5c31\u5c07 PKG \u6a94\u6848\u63db\u6210\u60e1\u610f\u7248\u672c\u3002<\/p>\n\n\n\n

4.        \u6b64\u6642\u8a72\u670d\u52d9\u6703\u5f9e\u5192\u724c\u3001\u672a\u7d93\u7c3d\u7f72\u7684 PKG \u6a94\u6848\u4e2d\u64f7\u53d6\u51fa\u60e1\u610f\u7684\u5b89\u88dd\u524d\u6216\u5b89\u88dd\u5f8c\u8173\u672c\u4f86\u57f7\u884c\u3002<\/p>\n\n\n\n

5.        \u8a72\u670d\u52d9\u555f\u52d5\u7684\u8173\u672c\u5c31\u6703\u5728\u4e00\u500b\u6c92\u6709 SIP \u9650\u5236\u7684\u74b0\u5883\u4e2d\u4ee5 root \u6b0a\u9650\u57f7\u884c\u3002<\/p>\n\n\n\n

\u503c\u5f97\u6ce8\u610f\u7684\u662f\u9019\u500b\u6f0f\u6d1e\u76f8\u7576\u5bb9\u6613\u7406\u89e3\u53ca\u653b\u64ca\uff0c\u6240\u4ee5\u6211\u5011\u5f88\u597d\u5947 Apple \u662f\u5982\u4f55\u5c07\u5b83\u89e3\u6c7a\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

CVE-2019-8561 \u5206\u6790<\/h3>\n\n\n\n


\u7576\u6211\u5011\u8a66\u5716\u653b\u64ca\u7576\u6642\u6700\u65b0\u7248\u4f5c\u696d\u7cfb\u7d71 macOS Monterey \u7684\u9019\u500b\u820a\u6f0f\u6d1e\u6642\uff0c\u6211\u5011\u6536\u5230\u4e00\u500b\u4f86\u81ea\u300cxar_open_digest_verify\u300d\u51fd\u5f0f\u7684\u932f\u8aa4\u8a0a\u606f\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u5716 2 \u986f\u793a\u6458\u8981\u503c (digest) \u9a57\u8b49\u51fd\u5f0f\u7684\u547c\u53eb\u5806\u758a\u5167\u5bb9\uff1a<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n


\u5716 2\uff1a\u6458\u8981\u503c (digest) \u9a57\u8b49\u51fd\u5f0f\u547c\u53eb\u5806\u758a\u5167\u5bb9\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u8a72\u8a0a\u606f\u6307\u51fa\u5167\u5bb9 (TOC) \u6458\u8981\u503c\u4e0d\u7b26\u5408\u9810\u671f\u3002<\/p>\n\n\n\n

\u7576\u6211\u5011\u5c0d PackageKit \u6846\u67b6\u4e2d\u7684\u51fd\u5f0f\u547c\u53eb\u5806\u758a\u9032\u884c\u9006\u5411\u5de5\u7a0b\u5206\u6790\u6642\uff0c\u6211\u5011\u767c\u73fe\u9019\u500b\u6458\u8981\u503c\u662f\u5f9e\u5b89\u88dd\u7528\u6236\u7aef\u6240\u50b3\u5165\u3002\u6b64\u5916\uff0c\u5b83\u9084\u6703\u5c07\u8981\u56de\u50b3\u7684 XAR \u58d3\u7e2e\u6a94\u6307\u6a19\u5132\u5b58\u5230\u4e00\u500b\u8b8a\u6578\u7576\u4e2d\u3002\u6240\u4ee5\uff0c\u7576\u5b83\u4e0b\u6b21\u9700\u8981\u5b58\u53d6 PKG \u6a94\u6848\u6642\uff0c\u5c31\u6703\u76f4\u63a5\u5f9e\u8a72\u8b8a\u6578\u50b3\u56de\u5148\u524d\u5132\u5b58\u7684 XAR \u6307\u6a19\uff0c\u800c\u975e\u518d\u6b21\u958b\u555f XAR \u58d3\u7e2e\u6a94\u3002<\/p>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 3\uff1aPKXARArchive _xar \u51fd\u5f0f\u5be6\u4f5c\u7a0b\u5f0f\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u5230\u9019\u88e1\u70ba\u6b62\uff0cApple \u7684\u4fee\u88dc\u4f3c\u4e4e\u767c\u63ee\u4e86\u4f5c\u7528\uff0c\u56e0\u70ba\u5b83\u5728\u64f7\u53d6\u5167\u5bb9\u6642\u6703\u5148\u6aa2\u67e5\u6458\u8981\u503c\u3002\u7136\u800c\u554f\u984c\u4e26\u975e\u50c5\u6b62\u65bc\u6b64\u3002 <\/p>\n\n\n\n

<\/div>\n\n\n\n

\u5206\u5169\u6b21\u6216\u4e09\u6b21\u8b80\u53d6<\/strong><\/p>\n\n\n\n


\u7531\u65bc\u4e00\u500b PKG \u6a94\u6848\u53ef\u80fd\u975e\u5e38\u5927\uff0c\u901a\u5e38\u4e0d\u5efa\u8b70\u5c07\u5176\u5167\u5bb9\u4e00\u6b21\u5168\u90e8\u8b80\u9032\u8a18\u61b6\u9ad4\u5167\u3002\u6240\u4ee5\uff0c\u4e00\u822c\u90fd\u662f\u5728\u9700\u8981\u6642\u624d\u8b80\u53d6\u548c\u89e3\u958b\u5167\u90e8\u7684\u5143\u4ef6\u3002<\/p>\n\n\n\n

\u7576\u6211\u5011\u89e3\u8b6f\u4e86 -[PKExtractInstallOperation _extractAllSpecifiersOnceAndReturnFailingSpecifier:andError:] \u51fd\u5f0f\u4e4b\u5f8c\uff0c\u6211\u5011\u767c\u73fe\u5b83\u6703\u547c\u53eb\u4e09\u500b\u4e0d\u540c\u7684\u65b9\u6cd5 (method) \u4f86\u5206\u5225\u64f7\u53d6\u6210\u5206\u6e05\u55ae (BOM) \u6a94\u6848\u3001\u60e1\u610f\u5167\u5bb9\uff0c\u4ee5\u53ca\u8173\u672c\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n


\u5716 4\uff1a_extractAllSpecifiersXXX \u65b9\u6cd5\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u7b2c\u4e00\u500b\u65b9\u6cd5\uff1a-[PKExtractInstallOperation _extractBomForPackageSpecifier:error:] \u6703\u5148\u6aa2\u67e5\u6458\u8981\u503c\u4e4b\u5f8c\u518d\u64f7\u53d6 BOM \u6a94\u6848\uff0c\u5982\u5716 2 \u6240\u793a\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u7b2c\u4e8c\u500b\u65b9\u6cd5\uff1a-[PKExtractInstallOperation _extractScriptsForPackageSpecifier:error:] \u7684\u5167\u90e8\u6703\u547c\u53eb -[PKLeopardPackage scriptsExtractorWithDestination:error:] \u51fd\u5f0f\u3002<\/p>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 5\uff1ascriptsExtractorXXX \u65b9\u6cd5\u5be6\u4f5c\u7a0b\u5f0f\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u6b64\u5916\u6211\u5011\u4e5f\u7814\u7a76\u4e86 -[PKPayloadCopier initWithArchivePath:offset:destination:] \u51fd\u5f0f\u3002<\/p>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 6\uff1ainitWithArchivePathXXX \u65b9\u6cd5\u5be6\u4f5c\u7a0b\u5f0f\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u5f9e\u5716 6 \u6211\u5011\u770b\u5230\u8a72\u51fd\u5f0f\u6703\u76f4\u63a5\u958b\u555f PKG \u6a94\u6848 (\u7b2c 20 \u884c)\uff0c\u5f9e\u67d0\u500b\u4f4d\u79fb\u4f4d\u7f6e\u8b80\u53d6\u8981\u50b3\u56de\u7684\u6a94\u6848\u63cf\u8ff0\u5143 (file descriptor)\uff0c\u5c07\u6a94\u6848\u63cf\u8ff0\u5143\u653e\u5165 BOMCopier\uff0c\u4e26\u5c07\u8f38\u5165\u9375 (Key) \u8a2d\u70ba\u300cinputFD\u300d\u3002<\/p>\n\n\n\n

\u63a5\u8457\u6211\u5011\u7e7c\u7e8c\u5206\u6790 -[PKPayloadCopier run] \u51fd\u5f0f\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 7\uff1a-[PKPayloadCopier run] \u65b9\u6cd5\u5be6\u4f5c\u7a0b\u5f0f\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u6b64\u51fd\u5f0f\u547c\u53eb API \u51fd\u5f0f\u300cBOMCopierCopyWithOptions\u300d\u5f9e\u672a\u53d7\u4fe1\u4efb\u7684\u300cinputFD\u300d\u64f7\u53d6\u8cc7\u6599\u3002<\/p>\n\n\n\n

\u4f7f\u7528 API \u51fd\u5f0f\u300cxar_open_digest_verify\u300d\u4f86\u958b\u555f\u4e00\u500b\u672a\u53d7\u4fe1\u4efb\u7684 PKG \u6a94\u6848\u662f\u5b89\u5168\u7684\uff0c\u4f46\u300copen\u300d\u51fd\u5f0f\u5247\u4e0d\u7136\u3002\u9019\u662f\u5178\u578b\u300c\u5206\u5169\u6b21\u8b80\u53d6\u300d\u6f0f\u6d1e\uff1a\u300copen\u300d\u51fd\u5f0f\u6703\u76f4\u63a5\u958b\u555f\u672a\u53d7\u4fe1\u4efb PKG \u6a94\u6848\u800c\u4e0d\u518d\u6aa2\u67e5\u5b83\u7684\u6458\u8981\u503c\uff0c\u6240\u4ee5\u99ed\u5ba2\u53ef\u5c07 PKG \u6a94\u6848\u7f6e\u63db\u6210\u4e00\u500b\u60e1\u610f\u7248\u672c\uff0c\u6240\u4ee5\u820a\u6f0f\u6d1e\u7684\u554f\u984c\u4f9d\u7136\u5b58\u5728\u3002  <\/p>\n\n\n\n

\u7b2c\u4e09\u500b\u65b9\u6cd5\uff1a-[PKExtractInstallOperation _extractPayloadForPackageSpecifier:error:] \u7684\u5167\u90e8\u6703\u547c\u53eb -[PKLeopardPackage payloadExtractorWithDestination:externalRoot:error:] \u51fd\u5f0f\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 8\uff1apayloadExtractorXXX \u65b9\u6cd5\u5be6\u4f5c\u7a0b\u5f0f\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u5728\u7b2c 28 \u884c\uff0c\u5982\u679c\u5728 PKG \u6a94\u6848\u7576\u4e2d\uff0c\u60e1\u610f\u5167\u5bb9\u7684\u5b50\u8def\u5f91\u4f4d\u79fb\u4f4d\u503c\u4e0d\u662f\u96f6\uff0c\u90a3\u9ebc -[PKLeopardPackage payloadExtractorWithDestination:externalRoot:error:] \u51fd\u5f0f\u5c31\u6703\u547c\u53eb -[PKPayloadCopier initWithArchivePath:offset:destination:] \u51fd\u5f0f\u3002\u8207\u524d\u9762\u7b2c\u4e8c\u500b\u65b9\u6cd5\u985e\u4f3c\uff0c\u9019\u88e1\u662f\u5178\u578b\u7684\u300c\u5206\u4e09\u6b21\u8b80\u53d6\u300d\u6f0f\u6d1e\u3002<\/p>\n\n\n\n

\u82e5\u4f4d\u79fb\u503c\u7b49\u65bc\u96f6\uff0c\u5b83\u5c31\u6703\u5f9e\u67d0\u500b\u5916\u90e8\u6839\u8def\u5f91 (root path) \u64f7\u53d6\u60e1\u610f\u5167\u5bb9\uff0c\u800c\u9019\u4f3c\u4e4e\u662f\u4e0d\u53d7\u9650\u5236\uff0c\u6240\u4ee5\u80fd\u88ab\u99ed\u5ba2\u64cd\u63a7\u3002\u4e5f\u5c31\u662f\u8aaa\uff0c\u99ed\u5ba2\u53ef\u4ee5\u5c07\u60e1\u610f\u5167\u5bb9\u653e\u5728\u5916\u90e8\u67d0\u500b\u6839\u8def\u5f91\u4e2d\u3002\u4e0d\u904e\uff0c\u622a\u81f3\u672c\u6587\u64b0\u7a3f\u70ba\u6b62\uff0c\u6211\u5011\u9084\u7121\u6cd5\u627e\u5230\u4e00\u500b Apple \u7c3d\u7f72\u7684 PKG \u6a94\u6848\u4f7f\u7528\u4e86\u4e00\u500b\u5916\u90e8\u6839\u8def\u5f91\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u6f0f\u6d1e\u653b\u64ca<\/strong><\/p>\n\n\n\n


\u76f8\u8f03\u65bc\u820a\u7684\u6f0f\u6d1e\u653b\u64ca\u624b\u6cd5\uff0c\u9019\u6b21\u7684\u7af6\u722d\u60c5\u6cc1 (race condition) \u7684\u6301\u7e8c\u6642\u9593\u8f03\u77ed\u3002\u5728\u64f7\u53d6\u60e1\u610f\u5167\u5bb9\u4e4b\u5f8c\uff0c\u99ed\u5ba2\u5fc5\u9808\u5c07 PKG \u6a94\u6848\u6062\u5fa9\u81f3\u539f\u672c Apple \u7c3d\u7f72\u7684\u7248\u672c\uff0c\u624d\u80fd\u8b93\u5f8c\u7e8c\u7684\u9a57\u8b49\u9806\u5229\u904e\u95dc\u3002\u800c\u4e14\u9084\u6709\u4e00\u500b\u6311\u6230\u5fc5\u9808\u514b\u670d\uff1a\u5728\u65b0\u7522\u751f\u7684 PKG \u6a94\u6848\u7576\u4e2d\uff0c\u8173\u672c\u6216\u60e1\u610f\u5167\u5bb9\u7684\u5b50\u8def\u5f91\u4f4d\u79fb\u503c\u5fc5\u9808\u8207\u539f\u59cb\u7684\u7248\u672c\u76f8\u540c\u624d\u884c\u3002<\/p>\n\n\n\n

\u70ba\u4e86\u653b\u64ca\u9019\u500b\u820a\u6f0f\u6d1e\uff0c\u6211\u5011\u9996\u5148\u6e96\u5099\u4e86\u4e00\u500b\u7279\u88fd\u7684 PKG \u6a94\u6848\uff0c\u88e1\u9762\u5305\u542b\u6211\u5011\u7684\u60e1\u610f\u5167\u5bb9\u3002\u63a5\u8457\u5c07\u539f\u59cb Apple \u7c3d\u7f72\u7684 PKG \u6a94\u6848\u5c55\u958b\uff0c\u6e05\u9664\u88e1\u9762\u539f\u672c\u7684\u8173\u672c\uff0c\u5c07\u6211\u5011\u7684\u60e1\u610f\u5167\u5bb9\u653e\u5165\u5b89\u88dd\u5f8c\u8173\u672c\u7576\u4e2d\u3002<\/p>\n\n\n\n

pkgutil –expand \/Volumes\/Pro\\ Video\\ Formats\/ProVideoFormats.pkg \/tmp\/ProVideoFormats
rm -rf \/tmp\/ProVideoFormats\/MXFPlugIns.pkg\/Scripts\/*
echo ‘#!\/bin\/bash’ > \/tmp\/ProVideoFormats\/MXFPlugIns.pkg\/Scripts\/postinstall
echo ‘touch \/Library\/Apple\/sip_bypass’ >> \/tmp\/ProVideoFormats\/MXFPlugIns.pkg\/Scripts\/postinstall
chmod +x \/tmp\/ProVideoFormats\/MXFPlugIns.pkg\/Scripts\/postinstall<\/p>\n\n\n\n

\u63a5\u4e0b\u4f86\uff0c\u70ba\u4e86\u514b\u670d\u8173\u672c\u5b50\u8def\u5f91\u4f4d\u79fb\u690d\u7684\u6311\u6230\uff0c\u6211\u5011\u64b0\u5beb\u4e86\u4e00\u500b Python \u8173\u672c\uff0c\u5728\u4e00\u500b\u7121\u76e1\u8ff4\u5708\u7576\u4e2d\u8a66\u5716\u5efa\u7acb\u9019\u500b\u65b0\u7684 PKG \u6a94\u6848\uff0c\u76f4\u5230\u4f4d\u79fb\u503c\u7b26\u5408\u8981\u6c42\u70ba\u6b62\u3002<\/p>\n\n\n\n

while True:
os.system(‘pkgutil –flatten \/tmp\/ProVideoFormats \/tmp\/ProVideoFormats.fake.pkg’)
f=open(‘\/tmp\/ProVideoFormats.fake.pkg’, ‘rb’) 
f.seek(scriptsOffsetInPkg) # the offset value from the original PKG
if f.read(4)==’\\x1f\\x8b\\x08\\x00′: break
f.close()<\/p>\n\n\n\n

\u505a\u597d\u9019\u500b\u7279\u88fd PKG \u6a94\u6848\u4e4b\u5f8c\uff0c\u63a5\u4e0b\u4f86\u5c31\u53ef\u4ee5\u5229\u7528\u4ee5\u4e0b\u6b65\u9a5f\u653b\u64ca\u6f0f\u6d1e\uff1a<\/p>\n\n\n\n

1.        \u5b89\u88dd\u4e00\u500b Apple \u7c3d\u7f72\u7684 PKG \u6a94\u6848\uff0c\u88e1\u9762\u5305\u542b\u5b89\u88dd\u5f8c\u8173\u672c\u3002<\/p>\n\n\n\n

2.        system_installd \u80cc\u666f\u670d\u52d9\u6703\u8655\u7406\u5b89\u88dd\u8acb\u6c42\u3002 <\/a><\/p>\n\n\n\n

3.        \u5728 -[PKLeopardPackage scriptsExtractorWithDestination:error:] \u51fd\u5f0f\u4e2d\uff0cPKG \u6a94\u6848\u6703\u88ab\u7f6e\u63db\u6210\u7279\u88fd\u7248\u672c (\u5728\u7b2c 8 \u884c\u81f3\u7b2c 16 \u884c\u4e4b\u9593)\u3002<\/p>\n\n\n\n

4.        \u7b49\u5230\u80cc\u666f\u670d\u52d9\u547c\u53eb API \u51fd\u5f0f\u300cBOMCopierCopyWithOptions\u300d\u4f86\u64f7\u53d6\u6211\u5011\u7279\u88fd PKG \u6a94\u6848\u4e2d\u7684\u60e1\u610f\u8173\u672c\u4e4b\u5f8c\uff0c\u5c07 PKG \u6a94\u6848\u6062\u5fa9\u6210\u539f\u59cb\u7248\u672c\u3002<\/p>\n\n\n\n

5.        \u63a5\u8457\uff0csystem_installd \u6703\u5efa\u7acb\u4e00\u500b\u4e0d\u53d7 SIP \u9650\u5236\u4e26\u5177\u5099 root \u6b0a\u9650\u7684\u74b0\u5883\u4f86\u57f7\u884c\u64f7\u53d6\u51fa\u4f86\u7684\u60e1\u610f\u8173\u672c\u3002<\/p>\n\n\n\n

Apple \u5728 macOS Ventura \u4e0a\u7684\u6700\u65b0\u4fee\u88dc\u65b9\u5f0f<\/strong><\/p>\n\n\n\n

Apple \u5f8c\u4f86\u53c8\u5728 macOS Ventura \u4e0a\u89e3\u6c7a\u4e86\u9019\u500b\u6f0f\u6d1e\uff0c\u4f5c\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u9996\u5148\uff0c\u65b0\u7684\u4fee\u88dc\u7a0b\u5f0f\u78bc\u6703\u900f\u904e\u53ef\u4fe1\u8cf4\u7684 XAR \u6307\u6a19\u8b80\u53d6 PKG \u6a94\u6848\u5b50\u8def\u5f91\u9810\u671f\u7684\u7e3d\u548c\u6aa2\u67e5\u78bc (checksum) \u5c6c\u6027\uff0c\u8a72\u6307\u6a19\u662f\u7531\u5b89\u5168\u7684 API \u51fd\u5f0f\u300cxar_open_digest_verify\u300d\u6240\u56de\u50b3\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 9\uff1a\u65b0\u7684\u4fee\u88dc\u7a0b\u5f0f\u78bc\u6703\u8b80\u53d6\u9810\u671f\u7684\u7e3d\u548c\u6aa2\u67e5\u78bc (checksum)\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u63a5\u8457\uff0c\u7a0b\u5f0f\u4e0d\u518d\u76f4\u63a5\u5f9e\u300cinputFD\u300d\u8b80\u53d6\u8cc7\u6599\uff0c\u800c\u662f\u4f7f\u7528\u4e00\u500b ObjC \u985e\u5225\u7684\u7269\u4ef6\u300cIASInputStream\u300d\u4f86\u8b80\u53d6\u300cinputStream\u300d\u3002\u5728\u64f7\u53d6\u904e\u7a0b\u4e2d\uff0c\u4e5f\u6703\u540c\u6b65\u66f4\u65b0\u300cinputStream\u300d\u7684\u6458\u8981\u503c\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 10\uff1a\u5f9e\u300cinputStream\u300d\u64f7\u53d6\u8cc7\u6599\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u64f7\u53d6\u5b8c\u6210\u5f8c\uff0c\u5b83\u6703\u6aa2\u67e5\u300cinputStream\u300d\u5be6\u969b\u7684\u7e3d\u548c\u6aa2\u67e5\u78bc\u662f\u5426\u8207\u9810\u671f\u7684\u76f8\u7b26\u3002\u5982\u679c\u662f\uff0c\u5c31\u7e7c\u7e8c\u57f7\u884c\u5b89\u88dd\u3002\u5426\u5247\uff0c\u5c31\u653e\u68c4\u5b89\u88dd\u6d41\u7a0b\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n


<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u5716 11\uff1a\u6aa2\u67e5\u5be6\u969b\u7684\u7e3d\u548c\u6aa2\u67e5\u78bc\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u6211\u5011\u8a8d\u70ba\uff0c\u6700\u597d\u7684\u89e3\u6c7a\u65b9\u6cd5\u4e5f\u8a31\u53ef\u4ee5\u5148\u5c07 PKG \u6a94\u6848\u8907\u88fd\u5230\u4e00\u500b\u5b89\u5168\u4f4d\u7f6e\u518d\u958b\u59cb\u57f7\u884c\u5b89\u88dd\u6d41\u7a0b\u3002Apple \u7c3d\u7f72\u7684\u5957\u4ef6\u61c9\u8a72\u8981\u88ab\u8907\u88fd\u5230\u4e00\u500b\u53d7 SIP \u4fdd\u8b77\u7684\u4f4d\u7f6e\uff0c\u5176\u9918\u7684\u5957\u4ef6\u5247\u61c9\u8a72\u8907\u88fd\u5230\u4e00\u500b root \u6240\u64c1\u6709\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n

\u4e0d\u904e\uff0cApple \u6700\u65b0\u7684\u4fee\u88dc\u5df2\u7d93\u6210\u529f\u5730\u89e3\u6c7a\u4e86\u9019\u500b\u6f0f\u6d1e\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u8cc7\u5b89\u5efa\u8b70<\/h2>\n\n\n\n

Apple \u5df2\u91cb\u51fa\u9019\u500b\u6f0f\u6d1e\u7684\u4fee\u88dc\u66f4\u65b0\uff0c\u4e5f\u6210\u529f\u5730\u5728\u4eca\u5e74\u7684 macOS Ventura \u7576\u4e2d\u89e3\u6c7a\u4e86\u9019\u554f\u984c\u3002\u4f7f\u7528\u8005\u82e5\u672a\u66f4\u65b0\u81ea\u5df1\u7684\u4f5c\u696d\u7cfb\u7d71\uff0c\u6709\u53ef\u80fd\u6703\u906d\u9047\u99ed\u5ba2\u5c07\u81ea\u5df1\u63d0\u5347\u5230\u7cfb\u7d71\u7ba1\u7406\u6b0a\u9650\u3001\u907f\u958b\u7c3d\u7ae0\u3001\u907f\u958b SIP \u6a5f\u5236\u7684\u60c5\u6cc1\u3002\u56e0\u6b64\uff0c\u4f7f\u7528\u8005\u52d9\u5fc5\u5b89\u88dd\u6240\u6709\u66f4\u65b0\u4f86\u78ba\u4fdd\u7cfb\u7d71\u7684\u5b89\u5168\u3002<\/p>\n\n\n\n

\u6b64\u5916\uff0c\u4e00\u822c\u4f7f\u7528\u8005\u4e5f\u53ef\u63a1\u7528\u4e00\u5957\u8cc7\u5b89\u7522\u54c1\uff0c\u5982 Trend Micro Antivirus for Mac<\/a> \u548c Trend Micro Protection Suites<\/a> \u4f86\u5354\u52a9\u5075\u6e2c\u53ca\u6514\u622a\u5c08\u9580\u5229\u7528\u9019\u985e\u6f0f\u6d1e\u7684\u653b\u64ca\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u539f\u6587\u51fa\u8655\uff1aCVE-2019-8561\uff1aA Hard-to-Banish PackageKit Framework Vulnerability in macOS<\/a> \u4f5c\u8005\uff1aMickey Jin<\/p>\n","protected":false},"excerpt":{"rendered":"

\u672c\u6587\u8a73\u7d30\u8aaa\u660e\u6211\u5011\u5c0d CVE-2019-8561 \u6f0f\u6d1e\u7684\u7814\u7a76\uff0c\u9019\u662f\u4e00\u500b\u5b58\u5728\u65bc macOS \u8edf\u9ad4\u5b89\u88dd\u5957\u4ef6 (PKG […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"today","timeOption":"now","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":"absolute"},"_wpsp_active_default_template":true},"categories":[3943,378,1,3654,156],"tags":[351,2292],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/75830"}],"collection":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=75830"}],"version-history":[{"count":2,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/75830\/revisions"}],"predecessor-version":[{"id":75832,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/75830\/revisions\/75832"}],"wp:attachment":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=75830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=75830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=75830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}