CVE-2018-12034 : Exploit Details and Defense Strategies
Learn about CVE-2018-12034, an out of bounds read vulnerability in YARA versions 3.7.1 and earlier, allowing attackers to read sensitive information. Find mitigation steps and prevention measures here.
An out of bounds read vulnerability may occur in yr_execute_code function in libyara/exec.c when parsing a specifically crafted compiled rule file in YARA versions 3.7.1 and earlier.
Understanding CVE-2018-12034
In YARA 3.7.1 and prior, parsing a specially crafted compiled rule file can cause an out of bounds read vulnerability in yr_execute_code in libyara/exec.c.
What is CVE-2018-12034?
This CVE describes an out of bounds read vulnerability in YARA versions 3.7.1 and earlier when processing a maliciously crafted compiled rule file.
The Impact of CVE-2018-12034
The vulnerability could be exploited by an attacker to read sensitive information from the memory of the affected system, potentially leading to information disclosure or further exploitation.
Technical Details of CVE-2018-12034
YARA versions 3.7.1 and earlier are susceptible to an out of bounds read vulnerability when handling specially crafted compiled rule files.
Vulnerability Description
The vulnerability arises in the yr_execute_code function in libyara/exec.c due to improper handling of compiled rule files, allowing an attacker to read beyond the bounds of allocated memory.
Affected Systems and Versions
- YARA versions 3.7.1 and earlier
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious compiled rule file and tricking a user or system into parsing it, leading to the out of bounds read.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-12034.
Immediate Steps to Take
- Update YARA to a non-vulnerable version if available
- Avoid parsing untrusted or unknown rule files
- Monitor vendor security advisories for patches or workarounds
Long-Term Security Practices
- Regularly update software and libraries to patched versions
- Implement robust security measures to prevent unauthorized access to systems
Patching and Updates
- Apply patches or upgrades provided by YARA to address the vulnerability and enhance system security