#VU27341 Heap-based buffer overflow in CUPS - CVE-2020-3898

Vulnerability identifier: #VU27341

Vulnerability 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

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
CUPS
Server applications / Other server solutions

Vendor: Apple Inc.

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 updates from vendor's website.

Vulnerable software versions

CUPS: 1.7.0 - 2.3.1

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-04/msg00040.html
https://bugzilla.suse.com/show_bug.cgi?id=1168422
https://www.suse.com/security/cve/CVE-2020-3898.html
https://github.com/apple/cups/releases/tag/v2.3.3

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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.