Ubuntu update for Libtasn1

1) Out-of-bounds read

EUVDB-ID: #VU7690

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-3622

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS conditions on the target system.

The weakness exists due to an error in the _asn1_extract_der_octet function in lib/decoding.c. A remote attacker can send a specially crafted certificate, trigger out-of-bounds heap read and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages

Ubuntu 15.04:

libtasn1-6 4.2-2ubuntu1.1

Ubuntu 14.10:

libtasn1-6 4.0-2ubuntu0.2

Ubuntu 14.04 LTS:

libtasn1-6 3.4-3ubuntu0.3

Ubuntu 12.04 LTS:

libtasn1-3 2.10-1ubuntu1.4

Vulnerable software versions

Ubuntu: 12.04 - 14.04

CPE2.3

• cpe:2.3:o:canonical:ubuntu:12.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-2604-1/

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.