Vulnerability identifier: #VU16184

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-18312

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Perl
Universal components / Libraries / Scripting languages

Vendor: Perl

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to heap-based buffer overflow write during compilation. A remote unauthenticated attacker can supply specially crafted regular expression, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.

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

Mitigation
Update to version 5.28.1.

Vulnerable software versions

Perl: 5.24.0 - 5.24.1, 5.23.0 - 5.23.9, 5.26.0 - 5.26.2, 5.16, 5.15, 5.14.0 - 5.14.1, 5.13.1 - 5.13.11, 5.12.0 - 5.12.3, 5.11.0 - 5.11.5, 5.10.0 - 5.10.1, 5.8.0 - 5.8.8, 5.6.0 - 5.6.2, 5.5, 5.4, 5.22.2-1, 5.28.0

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External links
http://rt.perl.org/Public/Bug/Display.html?id=133423

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