Stack-based buffer overflow in ConnMan - CVE-2021-26675
Published: February 12, 2021
Vulnerability identifier: #VU50670
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-26675
CWE-ID: CWE-121
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: kernel.org
Affected software:
ConnMan
ConnMan
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within dnsproxy in ConnMan. A remote unauthenticated attacker on the local network can send specially crafted packets to the affected system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-26675
Install updates from vendor's website.
Sources
- https://bugzilla.suse.com/show_bug.cgi?id=1181751
- https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=e4079a20f617a4b076af503f6e4e8b0304c9f2cb
- https://git.kernel.org/pub/scm/network/connman/connman.git/tree/ChangeLog
- https://lists.debian.org/debian-lts-announce/2021/02/msg00013.html
- https://www.debian.org/security/2021/dsa-4847
- https://www.openwall.com/lists/oss-security/2021/02/08/2