#VU83508 Off-by-one in Perl - CVE-2023-47038

Vulnerability identifier: #VU83508

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-47038

CWE-ID: CWE-193

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Perl
Universal components / Libraries / Scripting languages

Vendor: Perl

Description

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

The vulnerability exists due to an off-by-one error when processing regular expressions. A remote attacker can trigger an off-by-one error 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

Perl: 5.30.0 - 5.30.3, 5.31.0 - 5.31.11, 5.32.0 - 5.32.1, 5.33.0 - 5.33.9, 5.34.0 - 5.34.1, 5.35.0 - 5.35.11, 5.36.0 - 5.36.1, 5.37.0 - 5.37.11, 5.38.0, 5.39.0 - 5.39.4

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External links
http://ubuntu.com/security/notices/USN-6517-1
http://ubuntu.com/security/CVE-2023-47038

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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.