Vulnerability Details : CVE-2020-8443
Potential exploit
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).
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2020-8443
- cpe:2.3:a:ossec:ossec:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8443
1.53%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 80 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8443
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2020-8443
-
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.Assigned by: nvd@nist.gov (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-8443
-
https://github.com/ossec/ossec-hids/issues/1816
CVE-2020-8443: analysisd: OS_CleanMSG off-by-one heap overflow cleaning syslog msgs. · Issue #1816 · ossec/ossec-hids · GitHubExploit;Third Party Advisory
-
https://www.ossec.net/
OSSEC - World's Most Widely Used Host Intrusion Detection System - HIDSVendor Advisory
-
https://security.gentoo.org/glsa/202007-33
OSSEC: Multiple vulnerabilities (GLSA 202007-33) — Gentoo securityThird Party Advisory
-
https://github.com/ossec/ossec-hids/issues/1821
OSSEC-HIDS Security Audit Findings · Issue #1821 · ossec/ossec-hids · GitHubThird Party Advisory
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