Vulnerability identifier: #VU91500

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2009-1527

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: Yes

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

Vendor: Linux Foundation

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to a race condition within the ptrace_attach() and write_unlock_irqrestore() functions in kernel/ptrace.c. A local user can execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=cad81bc2529ab8c62b6fdc83a1c0c7f4a87209eb
http://secunia.com/advisories/34977
http://secunia.com/advisories/35120
http://wiki.rpath.com/Advisories:rPSA-2009-0084
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.30-rc4
http://www.openwall.com/lists/oss-security/2009/05/04/2
http://www.osvdb.org/54188
http://www.securityfocus.com/archive/1/503610/100/0/threaded
http://www.securityfocus.com/bid/34799
http://www.vupen.com/english/advisories/2009/1236
http://exchange.xforce.ibmcloud.com/vulnerabilities/50293

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