Integer overflow in Virustotal Yara
CVE-2021-3402
An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.022 (81.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
- Virustotal Yara
- Fedoraproject Fedora — versions 33, 34
- Libyara — versions libyara 4.0.4
Weakness classification (CWE)
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2021/01/29/2 (Exploit, Mailing List, Third Party Advisory)
- www.x41-dsec.de/lab/advisories/x41-2021-001-yara/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3402?
- CVE-2021-3402 is a critical-severity vulnerability in Virustotal Yara, classified under Integer Overflow or Wraparound. CVSS score: 9.1/10. Published 2021-05-14.
- How severe is CVE-2021-3402?
- Critical severity. CVSS v3 base score is 9.1 out of 10.