Vulnerability Details : CVE-2012-2127
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.
Vulnerability category: OverflowDenial of service
Products affected by CVE-2012-2127
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.8:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2012-2127
4.39%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 92 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2012-2127
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2012-2127
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The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2012-2127
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=905ad269c55fc62bee3da29f7b1d1efeba8aa1e1
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http://www.openwall.com/lists/oss-security/2012/04/20/25
oss-security - Re: CVE request: pid namespace leak in kernel 3.0 and 3.1Exploit
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https://github.com/torvalds/linux/commit/905ad269c55fc62bee3da29f7b1d1efeba8aa1e1
procfs: fix a vfsmount longterm reference leak · torvalds/linux@905ad26 · GitHubExploit;Patch
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https://bugzilla.redhat.com/show_bug.cgi?id=815188
815188 – (CVE-2012-2127) CVE-2012-2127 kernel: pid namespace leak in kernel 3.0 and 3.1Exploit
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http://www.securityfocus.com/bid/55774
Linux Kernel 'fs/proc/root.c' Remote Denial of Service Vulnerability
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http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.bz2
Patch
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https://bugzilla.novell.com/show_bug.cgi?id=757783
Bug 757783 – VUL-1: kernel: clone() with CLONE_NEWPID leaks kernel memoryExploit
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http://www.ubuntu.com/usn/USN-1594-1
USN-1594-1: Linux kernel (Oneiric backport) vulnerabilities | Ubuntu security notices
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http://www.kernel.org/pub/linux/kernel/v3.x/
Index of /pub/linux/kernel/v3.x/
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http://www.openwall.com/lists/oss-security/2012/04/22/1
oss-security - Re: Re: CVE request: pid namespace leak in kernel 3.0 and 3.1
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http://ubuntu.com/usn/usn-1607-1
USN-1607-1: Linux kernel vulnerabilities | Ubuntu security notices
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