Stack-based buffer overflow in libmspack (Alpine package)

1) Stack-based buffer overflow

EUVDB-ID: #VU14162

Risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-14679

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to stack-based buffer overflow the read_chunk function, as defined in the mspack/chmd.c source code file. A local attacker can send a specially crafted request that submits malicious input, trigger memory corruption and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libmspack (Alpine package): 0.5_alpha-r1 - 0.7.1-r0

CPE2.3

• cpe:2.3:a:alpine:libmspack_alpine_package:0.5_alpha-r1:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:libmspack_alpine_package:0.5_alpha-r1-r0:*:*:*:*:alpine_linux:*:3.4
• cpe:2.3:a:alpine:libmspack_alpine_package:0.7.1-r0:*:*:*:*:alpine_linux:*:3.5

External links

https://git.alpinelinux.org/aports/commit/?id=16c239033cd6df0b08dd57960724a9940cceba82
https://git.alpinelinux.org/aports/commit/?id=214cb233279c7ef0221557f24d0d0af79a46d3b7
https://git.alpinelinux.org/aports/commit/?id=3e3519a996d44c6d478d4e1d47cc6360a93da3c3
https://git.alpinelinux.org/aports/commit/?id=babf8851105592d4bc46ac85ef56f396f9e76c9f
https://git.alpinelinux.org/aports/commit/?id=c854dba4b5bde88f1673002621ab2bb8e0f66d4b

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