Buffer overflow in Linux kernel - CVE-2012-2127
Published: June 22, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43958
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-2127
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
fs/proc/root.c in the procfs implementation in the Linux kernel before 3.2 does not properly interact with CLONE_NEWPID clone system calls, which allows remote attackers to cause a denial of service (reference leak and memory consumption) by making many connections to a daemon that uses PID namespaces to isolate clients, as demonstrated by vsftpd.
How to mitigate CVE-2012-2127
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=905ad269c55fc62bee3da29f7b1d1efeba8aa1e1
- http://ubuntu.com/usn/usn-1607-1
- http://www.kernel.org/pub/linux/kernel/v3.x/
- http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.bz2
- http://www.openwall.com/lists/oss-security/2012/04/20/25
- http://www.openwall.com/lists/oss-security/2012/04/22/1
- http://www.securityfocus.com/bid/55774
- http://www.ubuntu.com/usn/USN-1594-1
- https://bugzilla.novell.com/show_bug.cgi?id=757783
- https://bugzilla.redhat.com/show_bug.cgi?id=815188
- https://github.com/torvalds/linux/commit/905ad269c55fc62bee3da29f7b1d1efeba8aa1e1