Use After Free Affecting gettext-devel package, versions <0:0.19.8.1-3.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL7-GETTEXTDEVEL-1522988
- published26 Jul 2021
- disclosed28 Oct 2018
Introduced: 28 Oct 2018
CVE-2018-18751 (opens in a new tab)How to fix?
Upgrade RHEL:7 gettext-devel to version 0:0.19.8.1-3.el7 or higher.
This issue was patched in RHSA-2020:1138.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gettext-devel package and not the gettext-devel package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
An issue was discovered in GNU gettext 0.19.8. There is a double free in default_add_message in read-catalog.c, related to an invalid free in po_gram_parse in po-gram-gen.y, as demonstrated by lt-msgfmt.
References
- https://access.redhat.com/security/cve/CVE-2018-18751
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublefree
- https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcorruption
- https://access.redhat.com/errata/RHSA-2020:1138
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html
- https://usn.ubuntu.com/3815-1/
- https://usn.ubuntu.com/3815-2/