Information disclosure in OpenAFS

1) Information disclosure

EUVDB-ID: #VU40608

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-7762

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

rx/rx.c in OpenAFS before 1.6.15 and 1.7.x before 1.7.33 does not properly initialize the padding of a data structure when constructing an Rx acknowledgement (ACK) packet, which allows remote attackers to obtain sensitive information by (1) conducting a replay attack or (2) sniffing the network.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenAFS: 1.7.1 - 1.7.31

Debian Linux: 1.7.1 - 8.0

CPE2.3

• cpe:2.3:a:openafs_org:openafs:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:openafs_org:openafs:1.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:openafs_org:openafs:1.7.3:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:1.7.2:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:1.7.3:*:*:*:*:*:*:*

External links

http://www.debian.org/security/2015/dsa-3387
http://www.securitytracker.com/id/1034039
http://lists.openafs.org/pipermail/openafs-announce/2015/000493.html
http://www.openafs.org/dl/openafs/1.6.15/RELNOTES-1.6.15
http://www.openafs.org/pages/security/OPENAFS-SA-2015-007.txt

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.