CVE-2021-3537 — Vulnerability in nokogiri — CVE Details
Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing
Summary
Advisory Timeline
- First published May 24, 2022 (1602 days ago).
- Last revised February 20, 2024 — 636 days after initial publication.
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)
Affects 1 ecosystem: rubygems (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-2012-6685HIGH
Nokogiri is vulnerable to XML External Entity (XXE) attack
- CVE-2020-7595HIGH
libxml as used in Nokogiri has an infinite loop in a certain end-of-file situation
- CVE-2015-8806HIGH
Denial of service or RCE from libxml2 and libxslt
- CVE-2017-9050HIGH
Out-of-bounds read in nokogiri
- CVE-2026-79770HIGH
Nokogiri CSS selector tokenizer has regular expression backtracking
- CVE-2019-13118HIGH
libxslt Type Confusion vulnerability that affects Nokogiri
- CVE-2017-18258MEDIUM
Uncontrolled resource consumption in nokogiri
- CVE-2026-57434LOW
Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes
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