Memory corruption in ZZIPlib - CVE-2018-7726

Vulnerability identifier: #VU11085

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-2018-7726

CWE-ID: CWE-119

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 __zzip_parse_root_directory function due to boundary error. A local attacker can supply a specially crafted .zip file to be processed, trigger a bus error and cause the service to crash.

ZZIPlib
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power
Ubuntu
Fedora
libzzip-0-13 (Ubuntu package)
zziplib

Install update from vendor's website.

libzzip-0-13 (Ubuntu package) - addressed in versions 0.13.62-2ubuntu0.2, 0.13.62-3ubuntu0.16.04.2, 0.13.62-3.1ubuntu0.17.10.1, 0.13.62-3.1ubuntu0.18.04.1
zziplib - update to 0.13.69-1.fc28

• https://github.com/gdraheim/zziplib/issues/41

• Denial of service in ZZIPlib
• Red Hat update for zziplib
• Fedora 28 update for zziplib
• Ubuntu update for zziplib