Use After Free Affecting yum package, versions <0:4.2.7-6.el8
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-RHEL8-YUM-3579936
- published26 Jul 2021
- disclosed21 Jan 2019
Introduced: 21 Jan 2019
CVE-2019-3817 (opens in a new tab)How to fix?
Upgrade RHEL:8 yum to version 0:4.2.7-6.el8 or higher.
This issue was patched in RHSA-2019:3583.
NVD Description
Note: Versions mentioned in the description apply only to the upstream yum package and not the yum package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A use-after-free flaw has been discovered in libcomps before version 0.1.10 in the way ObjMRTrees are merged. An attacker, who is able to make an application read a crafted comps XML file, may be able to crash the application or execute malicious code.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3817
- https://github.com/rpm-software-management/libcomps/commit/e3a5d056633677959ad924a51758876d415e7046
- https://github.com/rpm-software-management/libcomps/issues/41
- https://access.redhat.com/security/cve/CVE-2019-3817
- https://access.redhat.com/errata/RHSA-2019:3583