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fix: CVE-2026-27171 crc32_combine CPU consumption (backport of zlib 1.3.2 fix) [ArkUI-X-7.0-Release] #120
fix: CVE-2026-27171 crc32_combine CPU consumption (backport of zlib 1.3.2 fix) [ArkUI-X-7.0-Release] #120
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wu-jinpeng981212创建于 8月25日关闭于 17 天前
wu-jinpeng981212
8月25日

closes #239

Backport of the zlib 1.3.2 fix for CVE-2026-27171 onto this branch (vendored 1.3.1).

Vulnerability: x2nmodp() had no negative-n guard; a negative len2 through crc32_combine64()/crc32_combine_gen64() drove while(n) n >>= 1 without terminating (right-shift of a negative value never reaches zero) → unbounded CPU consumption (7ASECURITY audit).

Complete fix shape (1 file):

  • crc32_combine64() / crc32_combine_gen64(): if (len2 < 0) return 0;
  • x2nmodp() returns uLong; documented "n must not be negative"
  • braid() result cast to z_crc_t; crc32_z() cast last to int

Reachability: crc32.c ships in libz (BUILD.gn static+shared).

DCO Signed-off-by present. Same fix already proposed for master (see the master PR).
Upstream: https://github.com/madler/zlib/releases/tag/v1.3.2
(generated by ohos-cve-autofix)

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当前Pull Request已关闭, 关闭人@wu-jinpeng981212
wu-jinpeng981212wu-jinpeng981212
8月25日 关联了issue:[security] CVE-2026-27171: crc32_combine CPU consumption — backport to ArkUI-X-7.0-Release
wu-jinpeng981212
wu-jinpeng981212
8月25日 评论:

start build

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openharmony_ciopenharmony_ci成员
8月25日 添加了label:waiting_on_author
openharmony_ci
openharmony_ci成员
8月25日 评论:

该仓未配置门禁,无法触发构建。如需要检视代码请 pr作者 评论 code review

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openharmony_ci
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8月25日 评论:

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openharmony_ciopenharmony_ci成员
8月25日 添加了label:dco检查成功
wu-jinpeng981212wu-jinpeng981212
17 天前 关闭了 pull request