ALT-PU-2021-1915-1
Package kernel-image-std-def updated to version 5.4.123-alt1 for branch p9 in task 272878.
Closed vulnerabilities
Published: 2021-05-25
BDU:2021-04827
Уязвимость компонент kernel/bpf/verifier.c ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии до уровня root
Severity: HIGH (7.8)
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References:
Published: 2021-05-27
Modified: 2024-11-21
Modified: 2024-11-21
CVE-2021-33200
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
Severity: HIGH (7.8)
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References:
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e
- FEDORA-2021-646098b5b8
- FEDORA-2021-646098b5b8
- FEDORA-2021-0b35886add
- FEDORA-2021-0b35886add
- https://security.netapp.com/advisory/ntap-20210706-0004/
- https://security.netapp.com/advisory/ntap-20210706-0004/
- https://www.openwall.com/lists/oss-security/2021/05/27/1
- https://www.openwall.com/lists/oss-security/2021/05/27/1