CVE-2021-3518

HIGH8.8EPSS 0.25%

Nokogiri Implements libxml2 version vulnerable to use-after-free

Published: 5/24/2022Modified: 12/3/2025

Also known as:GHSA-v4f8-2847-rwm7ALPINE-CVE-2021-3518

Description

There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

Affected packages (3)

Alpine/libxml2from 0, < 2.9.9-r5
Debian/libxml2from 0, < 2.9.10+dfsg-6.6
RubyGems/nokogirifrom 0, < 1.11.4

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (26)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-3518
ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-3518
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-3518
PATCHhttps://github.com/sparklemotion/nokogiri
WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1954242
WEBhttp://seclists.org/fulldisclosure/2021/Jul/54
WEBhttp://seclists.org/fulldisclosure/2021/Jul/55
WEBhttp://seclists.org/fulldisclosure/2021/Jul/58
WEBhttp://seclists.org/fulldisclosure/2021/Jul/59
WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-3518.yml
WEBhttps://github.com/sparklemotion/nokogiri/blob/2edbbef95f1dc12c1ddc5ebda71b9159026245fe/CHANGELOG.md?plain=1#L722
WEBhttps://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
WEBhttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
WEBhttps://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6
WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV
WEBhttps://nokogiri.org/CHANGELOG.html#1114-2021-05-14
WEBhttps://security.gentoo.org/glsa/202107-05
WEBhttps://security.netapp.com/advisory/ntap-20210625-0002
WEBhttps://support.apple.com/kb/HT212601
WEBhttps://support.apple.com/kb/HT212602
WEBhttps://support.apple.com/kb/HT212604
WEBhttps://support.apple.com/kb/HT212605
WEBhttps://www.oracle.com/security-alerts/cpuapr2022.html
WEBhttps://www.oracle.com/security-alerts/cpujul2022.html
WEBhttps://www.oracle.com/security-alerts/cpuoct2021.html