#VU11079 NULL pointer dereference in Exempi - CVE-2018-7731

Vulnerability identifier: #VU11079

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-7731

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Exempi
Client/Desktop applications / Multimedia software

Vendor: Freedesktop.org

Description
The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the WEBP::VP8XChunk::VP8XChunk() function due to NULL pointer dereference. A local attacker can submit a specially crafted file, trigger memory corruption and cause the service to crash.

Mitigation
Update to version 2.4.5.

Vulnerable software versions

Exempi: 2.1.0 - 2.4.4

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External links
https://cgit.freedesktop.org/exempi/tree/NEWS

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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. However, proof of concept for this vulnerability is available.