Input validation error in apr (Alpine package)

1) Input validation error

EUVDB-ID: #VU33122

Risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2012-0840

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

tables/apr_hash.c in the Apache Portable Runtime (APR) library through 1.4.5 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libmodplug (Alpine package): 0.8.8.1-r0 - 0.8.8.3-r0

libvpx (Alpine package): 0.9.5-r0 - 0.9.7_p1-r0

CPE2.3

• cpe:2.3:o:alpine:libmodplug_alpine_package:0.8.8.1-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:libmodplug_alpine_package:0.8.8.1-r1:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:libmodplug_alpine_package:0.8.8.3-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:libvpx_alpine_package:0.9.5-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:libvpx_alpine_package:0.9.6-r1:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:libvpx_alpine_package:0.9.7_p1-r0:*:*:*:*:alpine_linux:*:2.3

External links

https://git.alpinelinux.org/aports/commit/?id=dcb8579326db06ec47137263bf122812825a69ea
https://git.alpinelinux.org/aports/commit/?id=471a8a4323cd195c605532f71410f23c203bd417
https://git.alpinelinux.org/aports/commit/?id=732f9b10763e0b407433dc1a724f0fbe5c2d6b10

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. However, proof of concept for this vulnerability is available.