Path traversal in libvdpau (Alpine package)

1) Path traversal

EUVDB-ID: #VU33080

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-5199

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in dlopen in libvdpau before 1.1.1. A remote authenticated attacker can send a specially crafted HTTP request and local users to gain privileges via the VDPAU_DRIVER environment variable.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libvdpau (Alpine package): 0.7-r1 - 1.1-r1

ruby (Alpine package): 2.0.0-r0 - 2.2.2-r0

CPE2.3

• cpe:2.3:a:alpine:libvdpau_alpine_package:0.7-r1:*:*:*:*:alpine_linux:*:2.7
• cpe:2.3:a:alpine:libvdpau_alpine_package:0.8-r0:*:*:*:*:alpine_linux:*:3.1
• cpe:2.3:a:alpine:libvdpau_alpine_package:1.1-r1:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:a:alpine:ruby_alpine_package:2.0.0-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:ruby_alpine_package:2.0.0_p247-r1:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:ruby_alpine_package:2.0.0_p247-r3:*:*:*:*:alpine_linux:*:2.6

External links

https://git.alpinelinux.org/aports/commit/?id=58c926355306673e726679d93b0e0c5b5a3df3c2
https://git.alpinelinux.org/aports/commit/?id=7b46352576c9f78aff928e671a222f2f7fe4da1d
https://git.alpinelinux.org/aports/commit/?id=f910f5627d6d0cef2b970fee2424e5f010cc9629

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.