2.6

CVE-2009-0591: openssl Improper Authentication

Modified
Published 27-03-2009Last modified 07-08-2024
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Vulnerability summary

CVE-2009-0591 is a low (CVSS 2.6) Improper Authentication vulnerability in openssl. EPSS estimates a 2.73% chance of exploitation in the next 30 days, higher than 86.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.6, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
2.6/10
010
Low · v2.0 (NVD)
EPSS score
2.73%
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 1 · Related 1
OPENSUSE-SU-2024:11127-1

Timeline

  1. 27-03-2009
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

The CMS_verify function in OpenSSL 0.9.8h through 0.9.8j, when CMS is enabled, does not properly handle errors associated with malformed signed attributes, which allows remote attackers to repudiate a signature that originally appeared to be valid but was actually invalid.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.73%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.73% 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.

Openssl1 product

1 vendor · 1 product

References

27 links
Show all 27 references