Improper locking in Linux kernel

1) Improper locking

EUVDB-ID: #VU95239

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-2005-3847

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The handle_stop_signal function in signal.c in Linux kernel 2.6.11 up to other versions before 2.6.13 and 2.6.12.6 allows local users to cause a denial of service (deadlock) by sending a SIGKILL to a real-time threaded process while it is performing a core dump.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

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

External links

https://lists.suse.de/archive/suse-security-announce/2006-Feb/0010.html
https://secunia.com/advisories/19038
https://www.debian.org/security/2006/dsa-1017
https://secunia.com/advisories/19374
https://www.securityfocus.com/bid/16856
https://marc.info/?l=linux-kernel&m=112508422716574&w=2
https://marc.info/?l=linux-kernel&m=112430346613450&w=2
https://www.kernel.org/git/?p=linux/kernel/git/chrisw/stable-queue.git%3Ba=blob%3Bh=f6cc7e101c49f356e4c4df5cca1ff352a0f01dd5%3Bhb=9c5fcb99af7c157be45e9d53aeb857ded5211fcd%3Bf=2.6.12.6/nptl-signal-delivery-deadlock-fix.patch
https://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=dd12f48d4e8774415b528d3991ae47c28f26e1ac%3Bhp=ade6648b3b11a5d81f6f28135193ab6d85d621db

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.