Input validation error in Linux kernel

1) Input validation error

EUVDB-ID: #VU43988

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-2496

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Integer overflow in the vma_to_resize function in mm/mremap.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (BUG_ON and system crash) via a crafted mremap system call that expands a memory mapping.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.38 - 2.6.38.7

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:2.6.38.7:*:*:*:*:*:*:*

External links

https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=982134ba62618c2d69fbbbd166d0a11ee3b7e3d8
https://www.openwall.com/lists/oss-security/2011/06/27/2
https://bugzilla.redhat.com/show_bug.cgi?id=716538
https://github.com/torvalds/linux/commit/982134ba62618c2d69fbbbd166d0a11ee3b7e3d8

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.