Heap-based buffer over-read in perl (Alpine package)

1) Heap-based buffer over-read

EUVDB-ID: #VU11834

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-6798

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

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

Install update from vendor's website.

Vulnerable software versions

perl (Alpine package): 5.24.3-r1

External links

http://git.alpinelinux.org/aports/commit/?id=22ea72268934176905fbf70461eb7a7210be1a76
http://git.alpinelinux.org/aports/commit/?id=f78615592ddca9ab00bdcc95ff939df19b557ca6
http://git.alpinelinux.org/aports/commit/?id=b016cc93af3bf95f617ec73a5e75228aed3235fc

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.