NULL pointer dereference in Exempi - CVE-2018-7731

Vulnerability identifier: #VU11079

CSH Severity: Low

CVSS v4: 5.1 [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]

CVE-ID: CVE-2018-7731

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Exempi
Ubuntu
Fedora
exempi (Ubuntu package)
libexempi3 (Ubuntu package)
python-msldap
exempi

Update to version 2.4.5.

exempi (Ubuntu package) - addressed in versions 2.2.1-1ubuntu1.1, 2.2.2-2ubuntu0.1, 2.4.3-1ubuntu1.1
libexempi3 (Ubuntu package) - addressed in versions 2.2.1-1ubuntu1.1, 2.2.2-2ubuntu0.1, 2.4.3-1ubuntu1.1
python-msldap - update to 0.3.15-1.fc33
exempi - addressed in versions 2.4.5-1.fc27, 2.4.5-1.fc28

• https://cgit.freedesktop.org/exempi/tree/NEWS

• Denial of service in Exempi
• Fedora 28 update for exempi
• Fedora 27 update for exempi
• Fedora 33 update for python-msldap
• Ubuntu update for exempi