Out-of-bounds Read Affecting kernel-bootwrapper package, versions <0:3.10.0-957.10.1.el7
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Test your applications- Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4877303
- published 26 Jul 2021
- disclosed 5 Oct 2018
Introduced: 5 Oct 2018
CVE-2018-18445 Open this link in a new tabHow to fix?
Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-957.10.1.el7 or higher.
This issue was patched in RHSA-2019:0512.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.
References
- https://support.f5.com/csp/article/K38456756
- https://access.redhat.com/security/cve/CVE-2018-18445
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1686
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.75
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.13
- https://github.com/torvalds/linux/commit/b799207e1e1816b09e7a5920fbb2d5fcf6edd681
- https://access.redhat.com/errata/RHSA-2019:0512
- https://usn.ubuntu.com/3832-1/
- https://usn.ubuntu.com/3835-1/
- https://usn.ubuntu.com/3847-1/
- https://usn.ubuntu.com/3847-2/
- https://usn.ubuntu.com/3847-3/