#VU38368 Out-of-bounds read in UnRar - CVE-2017-14122

Vulnerability identifier: #VU38368

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-14122

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
UnRar
Client/Desktop applications / Software for archiving

Vendor: RARLAB

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a stack-based buffer over-read in unrarlib.c, related to ExtrFile and stricomp.

Mitigation
Install update from vendor's website.

Vulnerable software versions

UnRar: 0.0.1

---

External links
https://www.openwall.com/lists/oss-security/2017/08/20/1
https://bugs.debian.org/874060

---

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.