Double Free Affecting gettext-libs 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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- published10 Apr 2022
- disclosed29 Oct 2018
Introduced: 29 Oct 2018
CVE-2018-18751 (opens in a new tab)How to fix?
Upgrade Oracle:7 gettext-libs to version 0:0.19.8.1-3.el7 or higher.
This issue was patched in ELSA-2020-1138.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gettext-libs package and not the gettext-libs package as distributed by Oracle.
See How to fix? for Oracle: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://linux.oracle.com/cve/CVE-2018-18751.html
- https://linux.oracle.com/errata/ELSA-2019-3643.html
- https://linux.oracle.com/errata/ELSA-2020-1138.html
- 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://access.redhat.com/errata/RHSA-2019:3643
- 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://usn.ubuntu.com/3815-1/
- https://usn.ubuntu.com/3815-2/