#VU11834 Heap-based buffer over-read in Perl - CVE-2018-6798

Vulnerability identifier: #VU11834

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6798

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Perl
Universal components / Libraries / Scripting languages

Vendor: Perl

Description
The vulnerability allows a local attacker to obtain potentially sensitive information or execute arbitrary code on the target system.

The weakness exists due to heap-based buffer over-read. A local attacker can exploit a specially crafted locale dependent regular expression, trigger memory corruption and gain access to potentially sensitive information or run Perl code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 5.26.2.

Vulnerable software versions

Perl: 5.26.0 - 5.26.1

---

External links
http://rt.perl.org/Public/Bug/Display.html?id=132063

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.