Vulnerability identifier: #VU29014

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10543

CWE-ID: CWE-190

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 integer overflow in nested regular expression quantifiers. A remote attacker can pass specially crafted data to the application, trigger integer overflow, leading to 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

Perl: 5.30.0 - 5.30.2, 5.5 - 5.5.3, 5.4 - 5.4.5, 5.6 - 5.6.2, 5.18.4, 5.13.0 - 5.13.11, 5.10 - 5.10.1, 5.9.2, 5.8.0 - 5.8.10, 5.28.0 - 5.28.1, 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, 5.12.0 - 5.12.3, 5.11.0 - 5.11.5, 5.22.2-1

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External links
http://github.com/Perl/perl5/blob/blead/pod/perl5303delta.pod
http://github.com/perl/perl5/commit/897d1f7fd515b828e4b198d8b8bef76c6faf03ed
http://github.com/Perl/perl5/compare/v5.30.2...v5.30.3
http://security.gentoo.org/glsa/202006-03
http://security.netapp.com/advisory/ntap-20200611-0001/

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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.