Vulnerability identifier: #VU39293

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5924

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
YARA
Server applications / Server solutions for antivurus protection

Vendor: VirusTotal

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted rule that is mishandled in the yr_compiler_destroy function. A remote attackers can cause a denial of service (use-after-free and application crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

YARA: 3.5.0

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External links
http://www.securityfocus.com/bid/98075
http://github.com/VirusTotal/yara/commit/7f02eca670f29c00a1d2c305e96febae6ce5d37b
http://github.com/VirusTotal/yara/issues/593

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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.