CVE-2017-9304 : Exploit Details and Defense Strategies
Learn about CVE-2017-9304 affecting YARA 3.5.0's _yr_re_emit function in libyara/re.c, allowing remote denial of service attacks. Find mitigation steps and prevention measures here.
YARA 3.5.0's _yr_re_emit function in libyara/re.c is susceptible to a denial of service attack due to mishandling crafted rules.
Understanding CVE-2017-9304
What is CVE-2017-9304?
YARA 3.5.0's regexp module, particularly libyara/re.c, is vulnerable to a denial of service attack caused by stack consumption when processing a specially crafted rule.
The Impact of CVE-2017-9304
Remote attackers can exploit this vulnerability to trigger a denial of service condition by sending maliciously crafted rules.
Technical Details of CVE-2017-9304
Vulnerability Description
The vulnerability in YARA 3.5.0 allows attackers to exhaust the stack, leading to a denial of service condition.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
Attackers can exploit this vulnerability remotely by sending specially crafted rules that trigger the mishandling in the _yr_re_emit function.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches or updates provided by the vendor promptly.
- Monitor security advisories for any new information or updates regarding this vulnerability.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement network security measures to detect and block malicious traffic.
- Conduct regular security assessments and audits to identify and address potential weaknesses.
Patching and Updates
It is crucial to apply the latest patches and updates released by YARA to address this vulnerability.