The DER parser in Suricata before 2.0.8 allows remote attackers to cause a denial of service (crash) via vectors related to SSL/TLS certificates.
Conclusion & alert: CVE-2015-0971 is rated Moderate Risk (40.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.39%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-09-14 | 0.26% | 0.39% | +0.14% |
| 2 | 2025-05-18 | 0.39% | 0.26% | -0.14% |
| 3 | 2025-03-30 | — | 0.39% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2015-0971 not yet assigned priority: Debian including 1 source packages (suricata), 4 status rows across 4 suites (bullseye, forky, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2015-0971 |
ubuntu
|
medium | CVE-2015-0971 medium priority: Ubuntu including 1 source packages (suricata), 9 status rows across 9 suites (precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 4, ignored 3, released 2. | https://ubuntu.com/security/CVE-2015-0971 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| openinfosecfoundation | suricata | <= 2.0.7 | cpe:2.3:a:openinfosecfoundation:suricata:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://suricata-ids.org/2015/05/06/suricata-2-0-8-available/ | Patch Vendor Advisory |
| http://www.debian.org/security/2015/dsa-3254 |