What’s Vulnerable › Vulnerabilities
CVE-2021-35063
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-07-22 · updated 2026-06-17
Description
Suricata before 5.0.7 and 6.x before 6.0.3 has a "critical evasion."
Affected products
- Debian Linux: 9.0, 10.0
- Fedoraproject Fedora: 34, 35
- OISF suricata: before 5.0.7; from 6.0.0 before 6.0.3 — fixed in 5.0.7, 6.0.3
How to fix
Upgrade to a fixed version: OISF suricata 5.0.7, 6.0.3. Check the vendor advisory for mitigations.
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990835
- https://bugzilla.redhat.com/show_bug.cgi?id=1980453
- https://forum.suricata.io/t/suricata-6-0-3-and-5-0-7-released/1489
- https://github.com/OISF/suricata/releases
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JU27J2ZYG6FBDL5CERE6FBB4ZFGHOROE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XEP7PWY4LRT2R4MFLV7JIJRYZEZ7RQFL/
- https://security-tracker.debian.org/tracker/CVE-2021-35063
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990835
- https://bugzilla.redhat.com/show_bug.cgi?id=1980453
- https://forum.suricata.io/t/suricata-6-0-3-and-5-0-7-released/1489
- https://github.com/OISF/suricata/releases
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JU27J2ZYG6FBDL5CERE6FBB4ZFGHOROE/
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