Heap-based buffer overflow in cups (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU27341

Risk: Medium

CVSSv4.0: 7.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-3898

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing files within the ppdFindOption() function in cups. A remote attacker can send specially crafted data to the daemon, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cups (Alpine package): 1.7.1-r0 - 2.2.12-r1

CPE2.3

• cpe:2.3:a:alpine:cups_alpine_package:1.7.1-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:cups_alpine_package:1.7.3-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:cups_alpine_package:1.7.3-r1:*:*:*:*:alpine_linux:*:2.7

External links

https://git.alpinelinux.org/aports/commit/?id=6f2628e207c537c621826025430a496c75d391c6
https://git.alpinelinux.org/aports/commit/?id=a32e693da9e322310101b4bd200d87fc718477c9

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

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.