#VU8604 Out-of-bounds read in UnRar - CVE-2017-12941

Vulnerability identifier: #VU8604

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-12941

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 attacker to crash the affected application.

The vulnerability exists due to out-of-bounds read in libunrar.a in UnRAR before 5.5.7 in the Unpack::Unpack20 function. A remote attacker can create a specially crafted archive and crash the affected application.

Mitigation
Update to version 5.5.7.

Vulnerable software versions

UnRar: 5.5.6

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External links
https://seclists.org/oss-sec/2017/q3/290

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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.