5.1

CVE-2009-2409: gnu gnutls Improper Certificate Validation

Modified
AliasesDEBIAN-CVE-2009-2409DSA-1888-1CGA-3pj6-p5hm-j9jx
Published 30-07-2009Last modified 07-08-2024

Vulnerability summary

CVE-2009-2409 is a medium (CVSS 5.1) Improper Certificate Validation vulnerability in gnu gnutls. EPSS estimates a 4.27% chance of exploitation in the next 30 days, higher than 91.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.1/10
010
Medium · v2.0 (NVD)
EPSS score
4.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 1
DSA-1874-1DSA-1935-1RHSA-2009:1184RHSA-2009:1186RHSA-2009:1190RHSA-2009:1207

Timeline

  1. 30-07-2009
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates by using MD2 design flaws to generate a hash collision in less than brute-force time. NOTE: the scope of this issue is currently limited because the amount of computation required is still large.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

4.27%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.27% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Debian3 products
  • nss< 3.12.3-1
  • openssl< 0.9.8c-4etch9 | < 0.9.8g-15+lenny5 | < 0.9.8k-4
  • openssl097< 0.9.7k-3.1etch5
Chainguard1 product
  • firefoxAll versions (No fix recorded)
Gnu1 product
  • gnutls< 2.6.4 | ≥ 2.7.0, < 2.7.4
Mozilla1 product
Openssl1 product
Wolfi1 product
  • firefoxAll versions (No fix recorded)

6 vendors · 8 products

References

38 links
Show all 38 references