Buffer overflow in Linux kernel

1) Buffer overflow

EUVDB-ID: #VU43751

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-2745

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The copy_creds function in kernel/cred.c in the Linux kernel before 3.3.2 provides an invalid replacement session keyring to a child process, which allows local users to cause a denial of service (panic) via a crafted application that uses the fork system call.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.3

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=79549c6dfda0603dba9a70a53467ce62d9335c33
https://rhn.redhat.com/errata/RHSA-2012-1064.html
https://secunia.com/advisories/50633
https://secunia.com/advisories/50853
https://secunia.com/advisories/50961
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.2
https://www.securityfocus.com/bid/54365
https://www.securitytracker.com/id?1027236
https://www.ubuntu.com/usn/USN-1567-1
https://www.ubuntu.com/usn/USN-1597-1
https://www.ubuntu.com/usn/USN-1606-1
https://bugzilla.redhat.com/show_bug.cgi?id=833428
https://github.com/torvalds/linux/commit/79549c6dfda0603dba9a70a53467ce62d9335c33

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.