Out-of-bounds Read in Virustotal Yara
CVE-2017-5923
libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Virustotal Yara — versions 3.5.0
Weakness classification (CWE)
References
- github.com/VirusTotal/yara/issues/597 (Exploit, Patch, Issue Tracking)
- www.securityfocus.com/bid/98080 (vdb-entry)
- github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2017-5923?
- CVE-2017-5923 is a high-severity vulnerability in Virustotal Yara, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2017-04-03.
- How severe is CVE-2017-5923?
- High severity. CVSS v3 base score is 7.5 out of 10.