Ubuntu update for bsdiff

1) Heap overflow in processing patch files

EUVDB-ID: #VU216

Risk: High

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:C/VI:C/VA:C/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2014-9862

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in FreeBSD bsdiff. A remote unauthenticated attacker can cause a heap overflow by creating a specially crafted patch file loaded by the target user via bspatch.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package bsdiff to the latest version.

Vulnerable software versions

Ubuntu: 16.04

bsdiff (Ubuntu package): before 4.3-15+deb8u1build0.16.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:bsdiff_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-4500-1

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.