Use After Free Affecting bpftool package, versions <0:3.10.0-1127.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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-RHEL7-BPFTOOL-7973232
- published14 Sept 2024
- disclosed4 Jul 2019
Introduced: 4 Jul 2019
CVE-2019-13233 (opens in a new tab)How to fix?
Upgrade RHEL:7 bpftool to version 0:3.10.0-1127.el7 or higher.
This issue was patched in RHSA-2020:1016.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
In arch/x86/lib/insn-eval.c in the Linux kernel before 5.1.9, there is a use-after-free for access to an LDT entry because of a race condition between modify_ldt() and a #BR exception for an MPX bounds violation.
References
- https://seclists.org/bugtraq/2019/Aug/13
- https://security.netapp.com/advisory/ntap-20190806-0001/
- https://support.f5.com/csp/article/K13331647?utm_source=f5support&utm_medium=RSS
- https://access.redhat.com/security/cve/CVE-2019-13233
- https://www.debian.org/security/2019/dsa-4495
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1879
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.9
- https://github.com/torvalds/linux/commit/de9f869616dd95e95c00bdd6b0fcd3421e8a4323
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=de9f869616dd95e95c00bdd6b0fcd3421e8a4323
- https://access.redhat.com/errata/RHSA-2020:1016
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
- https://usn.ubuntu.com/4093-1/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4117-1/
- https://usn.ubuntu.com/4118-1/
- https://support.f5.com/csp/article/K13331647?utm_source=f5support&%3Butm_medium=RSS