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Red Hat Enterprise Linux 7 RHSA-2022:1069-01 Critical Expat Code Execution

red hat
Calendar Grey March 28, 2022
Dist Redhat Esm H88
Important patch for expatriates using Red Hat Enterprise Linux 7 addresses vulnerabilities allowing unauthorized code execution. Update immediately!
An update for expat is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, applications using the Expat library must be restarted for the update to take effect.

Summary

Expat is a C library for parsing XML documents.
Security Fix(es):
* expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution (CVE-2022-25235)
* expat: Namespace-separator characters in "xmlns[:prefix]" attribute values can lead to arbitrary code execution (CVE-2022-25236)
* expat: Integer overflow in storeRawNames() (CVE-2022-25315)
* expat: Large number of prefixed XML attributes on a single tag can crash libexpat (CVE-2021-45960)
* expat: Integer overflow in doProlog in xmlparse.c (CVE-2021-46143)
* expat: Integer overflow in addBinding in xmlparse.c (CVE-2022-22822)
* expat: Integer overflow in build_model in xmlparse.c (CVE-2022-22823)
* expat: Integer overflow in defineAttribute in xmlparse.c (CVE-2022-22824)
* expat: Integer overflow in lookup in xmlparse.c (CVE-2022-22825)
* expat: Integer overflow in nextScaffoldPart in xmlparse.c (CVE-2022-22826)
* expat: Integer overflow in storeAtts in xmlparse.c (CVE-2022-22827)
* expat: Integer overflow in function XML_GetBuffer (CVE-2022-23852)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory security issue software update arbitrary code execution Red Hat Enterprise Linux important expat

References

https://access.redhat.com/security/cve/CVE-2021-45960 https://access.redhat.com/security/cve/CVE-2021-46143 https://access.redhat.com/security/cve/CVE-2022-22822 https://access.redhat.com/security/cve/CVE-2022-22823 https://access.redhat.com/security/cve/CVE-2022-22824 https://access.redhat.com/security/cve/CVE-2022-22825 https://access.redhat.com/security/cve/CVE-2022-22826 https://access.redhat.com/security/cve/CVE-2022-22827 https://access.redhat.com/security/cve/CVE-2022-23852 https://access.redhat.com/security/cve/CVE-2022-25235 https://access.redhat.com/security/cve/CVE-2022-25236 https://access.redhat.com/security/cve/CVE-2022-25315 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: expat-2.1.0-14.el7_9.src.rpm
x86_64: expat-2.1.0-14.el7_9.i686.rpm expat-2.1.0-14.el7_9.x86_64.rpm expat-debuginfo-2.1.0-14.el7_9.i686.rpm expat-debuginfo-2.1.0-14.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: expat-debuginfo-2.1.0-14.el7_9.i686.rpm expat-debuginfo-2.1.0-14.el7_9.x86_64.rpm expat-devel-2.1.0-14.el7_9.i686.rpm expat-devel-2.1.0-14.el7_9.x86_64.rpm expat-static-2.1.0-14.el7_9.i686.rpm expat-static-2.1.0-14.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: expat-2.1.0-14.el7_9.src.rpm
x86_64: expat-2.1.0-14.el7_9.i686.rpm expat-2.1.0-14.el7_9.x86_64.rpm expat-debuginfo-2.1.0-14.el7_9.i686.rpm expat-debuginfo-2.1.0-14.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: expat-debuginfo-2.1.0-14.el7_9.i686.rpm expat-debuginfo-2.1.0-14.el7_9.x86_64.rpm expat-devel-2.1.0-14.el7_9.i686.rpm expat-devel-2.1.0-14.el7_9.x86_64.rpm expat-static-2.1.0-14.el7_9.i686.rpm expat-static-2.1.0-14.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: expat-2.1.0-14.el7_9.src.rpm
ppc64: expat-2.1.0-14.el7_9.ppc.rpm expat-2.1.0-14.el7_9.ppc64.rpm expat-debuginfo-2.1.0-14.el7_9.ppc.rpm expat-debuginfo-2.1.0-14.el7_9.ppc64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1069-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1069
Issue date: 2022-03-28

Topic

An update for expat is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue software update arbitrary code execution Red Hat Enterprise Linux important expat

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

2044451 - CVE-2021-45960 expat: Large number of prefixed XML attributes on a single tag can crash libexpat

2044455 - CVE-2021-46143 expat: Integer overflow in doProlog in xmlparse.c

2044457 - CVE-2022-22822 expat: Integer overflow in addBinding in xmlparse.c

2044464 - CVE-2022-22823 expat: Integer overflow in build_model in xmlparse.c

2044467 - CVE-2022-22824 expat: Integer overflow in defineAttribute in xmlparse.c

2044479 - CVE-2022-22825 expat: Integer overflow in lookup in xmlparse.c

2044484 - CVE-2022-22826 expat: Integer overflow in nextScaffoldPart in xmlparse.c

2044488 - CVE-2022-22827 expat: Integer overflow in storeAtts in xmlparse.c

2044613 - CVE-2022-23852 expat: Integer overflow in function XML_GetBuffer

2056363 - CVE-2022-25315 expat: Integer overflow in storeRawNames()

2056366 - CVE-2022-25235 expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

2056370 - CVE-2022-25236 expat: Namespace-separator characters in "xmlns[:prefix]" attribute values can lead to arbitrary code execution

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