Missing release of memory after effective lifetime in Linux kernel

1) Missing release of memory after effective lifetime

EUVDB-ID: #VU95468

Risk: Low

CVSSv4.0: 5.4 [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:P/U:Clear]

CVE-ID: CVE-2005-3807

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: Yes

Description

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

Memory leak in the VFS file lease handling in locks.c in Linux kernels 2.6.10 to 2.6.15 allows local users to cause a denial of service (memory exhaustion) via certain Samba activities that cause an fasync entry to be re-allocated by the fcntl_setlease function after the fasync queue has already been cleaned by the locks_delete_lock function.

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://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dc15ae14e97ee9d5ed740cbb0b94996076d8b37e
https://marc.info/?l=linux-kernel&m=113190437101622&w=2
https://secunia.com/advisories/17917
https://secunia.com/advisories/17918
https://secunia.com/advisories/18203
https://www.securityfocus.com/advisories/9806
https://www.securityfocus.com/archive/1/419522/100/0/threaded
https://www.securityfocus.com/archive/1/427981/100/0/threaded
https://www.securityfocus.com/bid/15745
https://www.trustix.org/errata/2005/0070
https://www.ubuntulinux.org/usn/usn-231-1

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. However, proof of concept for this vulnerability is available.