NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
💎
💎 RubyGems
Not in CISA KEV
HIGH severity

Out-of-bounds Write in zlib affects NokogiriGHSA-v6gp-9mmm-c6p5

HIGH

GHSA-v6gp-9mmm-c6p5 is a high-severity (CVSS 7.5) remote code execution vulnerability in nokogiri. A fix is available for nokogiri — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Dec 5, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
💎nokogiri

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Nokogiri v1.13.4 updates the vendored zlib from 1.2.11 to 1.2.12, which addresses CVE-2018-25032. That CVE is scored as CVSS 7.4 "High" on the NVD record as of 2022-04-05.

Please note that this advisory only applies to the CRuby implementation of Nokogiri < 1.13.4, and only if the packaged version of zlib is being used. Please see this document for a complete description of which platform gems vendor zlib. If you've overridden defaults at installation time to use system libraries instead of packaged libraries, you should instead pay attention to your distro's zlib release announcements.

Mitigation

Upgrade to Nokogiri >= v1.13.4.

Impact

CVE-2018-25032 in zlib

  • Severity: High
  • Type: CWE-787 Out of bounds write
  • Description: zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsnokogiriall versions1.13.4bundle update nokogiri --conservative

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nokogiri, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update nokogiri to 1.13.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-v6gp-9mmm-c6p5 is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

## Summary Nokogiri v1.13.4 updates the vendored zlib from 1.2.11 to 1.2.12, which addresses [CVE-2018-25032](https://nvd.nist.gov/vuln/detail/CVE-2018-25032). That CVE is scored as CVSS 7.4 "High" on the NVD record as of 2022-04-05. Please note that this advisory only applies to the CRuby implementation of Nokogiri `< 1.13.4`, and only if the packaged version of `zlib` is being used. Please see [this document](https://nokogiri.org/LICENSE-DEPENDENCIES.html#default-platform-release-ruby) for a complete description of which platform gems vendor `zlib`. If you've overridden defaults at install
O3 Security · Impact-Aware SCA

Is GHSA-v6gp-9mmm-c6p5 in your dependencies?

Find it across RubyGems, including transitive dependencies.

Scan my dependencies How O3 SCA works
Out-of-bounds Write in zlib affects Nokogiri (High 7.5)