#VU95248 Improper locking in Linux kernel - CVE-2005-2456

Vulnerability identifier: #VU95248

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2005-2456

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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

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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.