Ubuntu ESM update for GNU C

1) Integer overflow

EUVDB-ID: #VU11548

Risk: Low

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-6485

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain elevated privileges on the target system.

The weakness exists in the implementation of the posix_memalign in memalign functions due to integer overflow when causing these functions to return a pointer to a heap area that is too small. A remote attacker can trigger memory corruption and gain root privileges.

Mitigation

Update the affected packages.

Ubuntu 14.04 ESM

libc6 - 2.19-0ubuntu6.15+esm1

Ubuntu 12.04 ESM

libc6 - 2.15-0ubuntu10.22

Vulnerable software versions

libc6 (Ubuntu package): 2.15-0ubuntu10.15 - 2.19-0ubuntu6.14

External links

http://usn.ubuntu.com/4218-1/

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.