Improper locking in Linux kernel

1) Improper locking

EUVDB-ID: #VU95248

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2005-2456

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

Array index overflow in the xfrm_sk_policy_insert function in xfrm_user.c in Linux kernel 2.6 allows local users to cause a denial of service (oops or deadlock) and possibly execute arbitrary code via a p->dir value that is larger than XFRM_POLICY_OUT, which is used as an index in the sock->sk_policy array.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

External links

http://www.securityfocus.com/bid/14477
http://secunia.com/advisories/16298
http://secunia.com/advisories/16500
http://www.novell.com/linux/security/advisories/2005_50_kernel.html
http://www.debian.org/security/2005/dsa-922
http://www.debian.org/security/2005/dsa-921
http://secunia.com/advisories/18056
http://secunia.com/advisories/18059
http://www.redhat.com/support/errata/RHSA-2005-514.html
http://www.redhat.com/support/errata/RHSA-2005-663.html
http://secunia.com/advisories/17073
http://secunia.com/advisories/17826
http://secunia.com/advisories/17002
http://www.vupen.com/english/advisories/2005/1878
http://www.mandriva.com/security/advisories?name=MDKSA-2005:220
http://www.mandriva.com/security/advisories?name=MDKSA-2005:219
http://exchange.xforce.ibmcloud.com/vulnerabilities/21710
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10858
http://usn.ubuntu.com/169-1/
http://www.securityfocus.com/archive/1/427980/100/0/threaded
http://www.mail-archive.com/netdev%40vger.kernel.org/msg00520.html
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=blobdiff%3Bh=8da3e25b2c4c1f305fd85428d3a9eb62b543bfba%3Bhp=ecade4893a139cc35d4fe345ce70242ede5358c4%3Bhb=a4f1bac62564049ea4718c4624b0fadc9f597c84%3Bf=net/xfrm/xfrm_user.c
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a4f1bac62564049ea4718c4624b0fadc9f597c84

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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