CVE-2012-2127

Published: 21 June 2012

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.

From the Ubuntu Security Team

Vadim Ponomarev discovered a flaw in the Linux kernel causing a reference leak when PID namespaces are used. A remote attacker could exploit this flaw causing a denial of service.

Notes

linux-armadaxp is maintained by OEM

Reproducer in oss-security link above
introduced in upstream 3.1 kernel

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2127
• http://www.openwall.com/lists/oss-security/2012/04/19/19
• https://ubuntu.com/security/notices/USN-1594-1
• https://ubuntu.com/security/notices/USN-1607-1
• NVD
• Launchpad
• Debian

Bugs

• https://bugzilla.novell.com/show_bug.cgi?id=757783
• https://launchpad.net/bugs/990365