Buffer overflow in Ossec
CVE-2020-8443
In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/ossec/ossec-hids/issues/1821 (Third Party Advisory)
- www.ossec.net/ (Vendor Advisory)
- github.com/ossec/ossec-hids/issues/1816 (Exploit, Third Party Advisory)
- security.gentoo.org/glsa/202007-33 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8443?
- CVE-2020-8443 is a critical-severity vulnerability in Ossec, classified under Off-by-one Error. CVSS score: 9.8/10. Published 2020-01-30.
- How severe is CVE-2020-8443?
- Critical severity. CVSS v3 base score is 9.8 out of 10.