Resource management error in Linux kernel - CVE-2012-6638
Published: February 15, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU42028
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-6638
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The tcp_rcv_state_process function in net/ipv4/tcp_input.c in the Linux kernel before 3.2.24 allows remote attackers to cause a denial of service (kernel resource consumption) via a flood of SYN+FIN TCP packets, a different vulnerability than CVE-2012-2663.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-image-2.6.32-350-ec2 (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-image-2.6.32-350-ec2 (Ubuntu package)
How to mitigate CVE-2012-6638
Install update from vendor's website.
linux (Ubuntu package) - addressed in versions 2.6.32-45.100, 3.2.0-29.46
linux-image-2.6.32-350-ec2 (Ubuntu package) - update to 2.6.32-350.57
linux-image-2.6.32-350-ec2 (Ubuntu package) - update to 2.6.32-350.57
External References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fdf5af0daf8019cec2396cdef8fb042d80fe71fa
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.24
- https://bugzilla.redhat.com/show_bug.cgi?id=826702
- https://github.com/torvalds/linux/commit/fdf5af0daf8019cec2396cdef8fb042d80fe71fa