Fedora 22 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

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

libtasn1: before 4.5-1.fc22

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:libtasn1:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2015-7327

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.