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Red Hat: RHSA-2020-4846-01 Moderate: mingw-expat DoS Threat

red hat
Calendar Grey November 4, 2020
Dist Redhat Esm H88
Red Hat issues a significant security patch for mingw-expat. Investigate potential DoS weaknesses immediately.
An update for mingw-expat is now available for Red Hat Enterprise Linux 8

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

Summary

Expat is a C library for parsing XML documents. The mingw-expat packages provide a port of the Expat library for MinGW.
Security Fix(es):
* expat: large number of colons in input makes parser consume high amount of resources, leading to DoS (CVE-2018-20843)
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 8.3 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory security update security issue Red Hat DoS moderate severity mingw-expat

References

https://access.redhat.com/security/cve/CVE-2018-20843 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

Package List

Red Hat CodeReady Linux Builder (v. 8):
Source: mingw-expat-2.2.4-5.el8.src.rpm
noarch: mingw32-expat-2.2.4-5.el8.noarch.rpm mingw32-expat-debuginfo-2.2.4-5.el8.noarch.rpm mingw64-expat-2.2.4-5.el8.noarch.rpm mingw64-expat-debuginfo-2.2.4-5.el8.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/


Advisory ID: RHSA-2020:4846-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4846
Issue date: 2020-11-03

Topic

An update for mingw-expat is now available for Red Hat Enterprise Linux 8.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 security update security issue Red Hat DoS moderate severity mingw-expat

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - noarch

Bugs Fixed

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

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