Memory leak in expat (Alpine package)

1) Memory leak

EUVDB-ID: #VU33116

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-2012-1148

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the poolGrow function in expat/lib/xmlparse.c in expat before 2.1.0 allows context-dependent attackers to cause a denial of service (memory consumption) via a large number of crafted XML files that cause improperly-handled reallocation failures when expanding entities. A remote attacker can perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

expat (Alpine package): 2.0.1-r0 - 2.0.1-r6

CPE2.3

• cpe:2.3:o:alpine:expat_alpine_package:2.0.1-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:expat_alpine_package:2.0.1-r1:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:expat_alpine_package:2.0.1-r3:*:*:*:*:alpine_linux:*:2.0

External links

https://git.alpinelinux.org/aports/commit/?id=e225209377749c969b4b412b62736f706b32c830
https://git.alpinelinux.org/aports/commit/?id=ebc04c0210d45efc4e5156905cdda9900f4f1ad3
https://git.alpinelinux.org/aports/commit/?id=82105c6f2874a73741115858c9a6d520d13355bd

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.