CVE-2021-3537
Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing
Summary
Remediation
Upgrade to the fixed version using your package manager.
gem install nokogiri -v 1.11.4
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (1)
| Package | Ecosystem | Affected | Fixed In |
|---|---|---|---|
| nokogiri | rubygems | 1.0.0, 1.0.1, 1.0.2, 1.0.3 (+124 more) | 1.11.4 |
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-476NULL Pointer DereferenceMITRE
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 5.9 score means for each attack dimension.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-3537ADVISORY
- https://bugzilla.redhat.com/show_bug.cgi?id=1956522WEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-3537.ymlWEB
- https://github.com/sparklemotion/nokogiriPACKAGE
- https://github.com/sparklemotion/nokogiri/blob/2edbbef95f1dc12c1ddc5ebda71b9159026245fe/CHANGELOG.md?plain=1#L722WEB
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.htmlWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WVWEB
- https://nokogiri.org/CHANGELOG.html#1114-2021-05-14WEB
- https://security.gentoo.org/glsa/202107-05WEB
- https://security.netapp.com/advisory/ntap-20210625-0002WEB
- https://www.oracle.com/security-alerts/cpuapr2022.htmlWEB
- https://www.oracle.com/security-alerts/cpujul2022.htmlWEB
- https://www.oracle.com/security-alerts/cpuoct2021.htmlWEB
Frequently Asked Questions
- What is CVE-2021-3537?
- Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.9/10).
- How do I check if my project is affected by CVE-2021-3537?
- CVE-2021-3537 affects nokogiri. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-3537 and 200,000+ other known vulnerabilities.
Severity & Exploitability
Exploitation requires specific conditions or has limited impact. Remediate within weeks.
Also Known As
Related CVEs
- CVE-2019-11068CRITICAL
Nokogiri vulnerable to libxslt protection mechanism bypass
- CVE-2021-3517HIGH
Nokogiri contains libxml Out-of-bounds Write vulnerability
- GHSA-mrxw-mxhj-p664HIGH
Nokogiri updates packaged libxslt to v1.1.43 to resolve multiple CVEs
- CVE-2017-5029HIGH
Nokogiri implementation of libxslt lacks integer overflow checks
- CVE-2022-23476HIGH
Unchecked return value from xmlTextReaderExpand
- CVE-2017-15412HIGH
Nokogiri gem, via libxml, is affected by DoS vulnerabilities
- CVE-2026-57437LOW
Nokogiri: Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond document lifetime
- CVE-2026-57435LOW
Nokogiri: Possible Use-After-Free when setting an attribute value via `Nokogiri::XML::Attr#value=` or `#content=`
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