Information disclosure in YARA - CVE-2018-19975
Published: December 23, 2018
Vulnerability identifier: #VU16656
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-19975
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to gain access to potentially sensitive information.
The vulnerability exists due to the design of the YARA virtual machine (VM), which could allow an attacker to use OP_COUNT to read a DWORD value from any arbitrary memory address. A local attacker can execute a compiled rule file that submits malicious input and read data from any arbitrary address in memory, in libyara/exec.c.
Affected software
YARA
Fedora
Ubuntu
yara (Ubuntu package)
yara
python-yara
Fedora
Ubuntu
yara (Ubuntu package)
yara
python-yara
How to mitigate CVE-2018-19975
Install update from vendor's website.
yara (Ubuntu package) - addressed in versions 3.4.0+dfsg-2ubuntu0.1~esm1, 3.7.1-1ubuntu2+esm1, 3.9.0-1ubuntu0.1~esm1
yara - addressed in versions 3.9.0-1.fc30, 3.10.0-2.fc30, 3.10.0-3.el7, 3.11.0-1.el6
python-yara - update to 3.9.0-2.fc30
yara - addressed in versions 3.9.0-1.fc30, 3.10.0-2.fc30, 3.10.0-3.el7, 3.11.0-1.el6
python-yara - update to 3.9.0-2.fc30