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Red Hat Enterprise Linux: RHSA-2020-3952-01 Moderate: Expat DoS Risk

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
Debian's recent notice regarding libxml2 tackles memory usage and overflow vulnerabilities. Ensure you update promptly.
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: large number of colons in input makes parser consume high amount of resources, leading to DoS (CVE-2018-20843)
* expat: heap-based buffer over-read via crafted XML input (CVE-2019-15903)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat DoS buffer over-read expat

References

https://access.redhat.com/security/cve/CVE-2018-20843 https://access.redhat.com/security/cve/CVE-2019-15903 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: expat-2.1.0-12.el7.src.rpm
x86_64: expat-2.1.0-12.el7.i686.rpm expat-2.1.0-12.el7.x86_64.rpm expat-debuginfo-2.1.0-12.el7.i686.rpm expat-debuginfo-2.1.0-12.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: expat-debuginfo-2.1.0-12.el7.i686.rpm expat-debuginfo-2.1.0-12.el7.x86_64.rpm expat-devel-2.1.0-12.el7.i686.rpm expat-devel-2.1.0-12.el7.x86_64.rpm expat-static-2.1.0-12.el7.i686.rpm expat-static-2.1.0-12.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: expat-2.1.0-12.el7.src.rpm
x86_64: expat-2.1.0-12.el7.i686.rpm expat-2.1.0-12.el7.x86_64.rpm expat-debuginfo-2.1.0-12.el7.i686.rpm expat-debuginfo-2.1.0-12.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: expat-debuginfo-2.1.0-12.el7.i686.rpm expat-debuginfo-2.1.0-12.el7.x86_64.rpm expat-devel-2.1.0-12.el7.i686.rpm expat-devel-2.1.0-12.el7.x86_64.rpm expat-static-2.1.0-12.el7.i686.rpm expat-static-2.1.0-12.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: expat-2.1.0-12.el7.src.rpm
ppc64: expat-2.1.0-12.el7.ppc.rpm expat-2.1.0-12.el7.ppc64.rpm expat-debuginfo-2.1.0-12.el7.ppc.rpm expat-debuginfo-2.1.0-12.el7.ppc64.rpm expat-devel-2.1.0-12.el7.ppc.rpm expat-devel-2.1.0-12.el7.ppc64.rpm
ppc64le:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3952-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3952
Issue date: 2020-09-29

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 Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat DoS buffer over-read 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

1723723 - CVE-2018-20843 expat: large number of colons in input makes parser consume high amount of resources, leading to DoS

1752592 - CVE-2019-15903 expat: heap-based buffer over-read via crafted XML input

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