Bug 2136288 (CVE-2022-40304) - CVE-2022-40304 libxml2: dict corruption caused by entity reference cycles
Summary: CVE-2022-40304 libxml2: dict corruption caused by entity reference cycles
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-40304
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2136292 2136294 2136295 2136301 2136293 2136567 2136568 2136569 2136570 2136571
Blocks: 2169449 2135075
TreeView+ depends on / blocked
 
Reported: 2022-10-19 20:22 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-02-20 17:32 UTC (History)
40 users (show)

Fixed In Version: libxml2 2.10.3
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in libxml2. When a reference cycle is detected in the XML entity cleanup function the XML entity data can be stored in a dictionary. In this case, the dictionary becomes corrupted resulting in logic errors, including memory errors like double free.
Clone Of:
Environment:
Last Closed: 2023-01-28 16:52:14 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:8841 0 None None None 2022-12-08 13:22:41 UTC
Red Hat Product Errata RHSA-2023:0173 0 None None None 2023-01-16 09:22:30 UTC
Red Hat Product Errata RHSA-2023:0338 0 None None None 2023-01-23 15:21:58 UTC

Description Guilherme de Almeida Suckevicz 2022-10-19 20:22:28 UTC 
A flaw was found in libxml2. When a reference cycle is detected in the XML entity cleanup function the XML entity data can be stored in a dictionary. In this case, the dictionary becomes corrupted resulting in logic errors, including memory errors like double free.
Comment 1 Guilherme de Almeida Suckevicz 2022-10-19 20:23:35 UTC 
Upstream patch:
https://gitlab.gnome.org/GNOME/libxml2/-/commit/1b41ec4e9433b05bb0376be4725804c54ef1d80b
Comment 2 Guilherme de Almeida Suckevicz 2022-10-19 20:24:47 UTC 
Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 2136293]


Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 2136294]


Created qt5-qtwebengine tracking bugs for this issue:

Affects: epel-all [bug 2136292]
Affects: fedora-all [bug 2136295]
Comment 3 Guilherme de Almeida Suckevicz 2022-10-19 21:01:17 UTC 
Created perl-Alien-Libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 2136301]
Comment 9 errata-xmlrpc 2022-12-08 13:22:38 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services

Via RHSA-2022:8841 https://access.redhat.com/errata/RHSA-2022:8841
Comment 11 errata-xmlrpc 2023-01-16 09:22:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0173 https://access.redhat.com/errata/RHSA-2023:0173
Comment 12 errata-xmlrpc 2023-01-23 15:21:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0338 https://access.redhat.com/errata/RHSA-2023:0338
Comment 14 Product Security DevOps Team 2023-01-28 16:52:10 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-40304
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