5

CVE-2007-2243: openbsd openssh Improper Authentication

CVSS: 5.0v2.0MediumModified
AliasesDEBIAN-CVE-2007-2243
Published 25-04-2007Last modified 07-08-2024
Open JSON

Vulnerability summary

CVE-2007-2243 is a medium (CVSS 5.0) Improper Authentication vulnerability in openbsd openssh. EPSS estimates a 2.40% chance of exploitation in the next 30 days, higher than 83.7% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v2.0 (NVD)
EPSS score
2.40%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-04-2007
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

2.40%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

-0.07 pp

From 2.47% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • opensshAll versions (No fix recorded)
Openbsd1 product
  • openssh1.2 | 1.2.1 | 1.2.2 | 1.2.3 | 1.2.27 | 2.1 | 2.1.1 | 2.2 | 2.3 | 2.5 | 2.5.1 | 2.5.2 | 2.9 | 2.9.9 | 2.9.9p2 | 2.9p1 | 2.9p2 | 3.0 | 3.0.1 | 3.0.1p1 | 3.0.2 | 3.0.2p1 | 3.0p1 | 3.1 | 3.1p1 | 3.2 | 3.2.2 | 3.2.2p1 | 3.2.3p1 | 3.3 | 3.3p1 | 3.4 | 3.4p1 | 3.5 | 3.5p1 | 3.6 | 3.6.1 | 3.6.1p1 | 3.6.1p2 | 3.7 | 3.7.1 | 3.7.1p1 | 3.7.1p2 | 3.8 | 3.8.1 | 3.8.1p1 | 3.9 | 3.9.1 | 3.9.1p1 | 4.0 | 4.0p1 | 4.1 | 4.1p1 | 4.2 | 4.2p1 | 4.3 | 4.3p1 | 4.3p2 | 4.4 | 4.4p1 | 4.5 | 4.6

2 vendors · 2 products

References

8 links