Input validation error in libxslt (Alpine package)

1) Input validation error

EUVDB-ID: #VU32709

Risk: Medium

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:Green]

CVE-ID: CVE-2012-6139

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and crash) via an (1) empty match attribute in a XSL key to the xsltAddKey function in keys.c or (2) uninitialized variable to the xsltDocumentFunction function in functions.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libxslt (Alpine package): 1.1.27-r0 - 1.1.27-r1

CPE2.3

• cpe:2.3:o:alpine:libxslt_alpine_package:1.1.27-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:libxslt_alpine_package:1.1.27-r1:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=8e920dd663a42cb6ea964be5ccb031f366f02d17
https://git.alpinelinux.org/aports/commit/?id=a2e601eb1db7a32b0a38fbdc4f82f099d30b9432
https://git.alpinelinux.org/aports/commit/?id=41e8966524d8707e6231f55074578038aa6ec2aa
https://git.alpinelinux.org/aports/commit/?id=449c589ab6a4b056fc997a4fc1474a5f9a3b344a
https://git.alpinelinux.org/aports/commit/?id=d6422a55cb45a443a665ae96737b0945cfc1a3f6

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.