#VU51545 Buffer overflow in Linux kernel - CVE-2020-25211
Published: March 17, 2021
Vulnerability identifier: #VU51545
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25211
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to crash the system.
The vulnerability exists due to a boundary error within the ctnetlink_parse_tuple_filter() function in net/netfilter/nf_conntrack_netlink.c. A local user can inject conntrack netlink configuration, trigger buffer overflow and crash the kernel or force usage of incorrect protocol numbers.
Remediation
Install updates from vendor's website.
External links
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6
- https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BL2O4JAMPJG4YMLLJ7JFDHDJRXN4RKTC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OLDYVOM4OS55HA45Y3UEVLDHYGFXPZUX/
- https://security.netapp.com/advisory/ntap-20201009-0001/
- https://twitter.com/grsecurity/status/1303646421158109185
- https://www.debian.org/security/2020/dsa-4774