#VU95762 Improper locking in Linux kernel - CVE-2005-3106

Vulnerability identifier: #VU95762

Vulnerability risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2005-3106

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.

Race condition in Linux 2.6, when threads are sharing memory mapping via CLONE_VM (such as linuxthreads and vfork), might allow local users to cause a denial of service (deadlock) by triggering a core dump while waiting for a thread that has just performed an exec.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://www.ubuntu.com/usn/usn-199-1
https://www.debian.org/security/2005/dsa-922
https://secunia.com/advisories/18056
https://www.securityfocus.com/bid/15049
https://www.redhat.com/support/errata/RHSA-2006-0101.html
https://secunia.com/advisories/18510
https://secunia.com/advisories/17141
https://www.mandriva.com/security/advisories?name=MDKSA-2006:072
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9108
https://www.securityfocus.com/archive/1/427980/100/0/threaded
https://linux.bkbits.net:8080/linux-2.6/diffs/fs/exec.c%401.156?nav=index.html%7Csrc/%7Csrc/fs%7Chist/fs/exec.c

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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.