CVE-2004-2760
CVE-2004-2760 is a medium-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.
Key facts
- Severity: Medium (CVSS 2.0 base score 6.8)
- EPSS exploit prediction: 9% (94th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-16
- Affected product: Openbsd Openssh
- Published:
- Last modified:
Description
sshd in OpenSSH 3.5p1, when PermitRootLogin is disabled, immediately closes the TCP connection after a root login attempt with the correct password, but leaves the connection open after an attempt with an incorrect password, which makes it easier for remote attackers to guess the password by observing the connection state, a different vulnerability than CVE-2003-0190. NOTE: it could be argued that in most environments, this does not cross privilege boundaries without requiring leverage of a separate vulnerability.
Frequently asked questions
- What is CVE-2004-2760?
- sshd in OpenSSH 3.5p1, when PermitRootLogin is disabled, immediately closes the TCP connection after a root login attempt with the correct password, but leaves the connection open after an attempt with an incorrect password, which makes it easier for remote attackers to guess the password by observing the connection state, a different vulnerability than CVE-2003-0190. NOTE: it could be argued that in most environments, this does not cross privilege boundaries without requiring leverage of a separate vulnerability.
- How severe is CVE-2004-2760?
- CVE-2004-2760 has a CVSS 2.0 base score of 6.8, rated medium severity.
- Is CVE-2004-2760 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2004-2760?
- CVE-2004-2760 primarily affects Openbsd Openssh. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2004-2760?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2004-2760 published?
- CVE-2004-2760 was published on 2004-12-31 and last updated on 2026-06-16.
References
- http://archive.cert.uni-stuttgart.de/bugtraq/2004/04/msg00162.html
- http://securityreason.com/securityalert/4100
- http://www.securityfocus.com/archive/1/360198
Affected products (2)
- cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*
More vulnerabilities in Openbsd Openssh
- CVE-2003-0786 — Critical (CVSS 10.0): The SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is disabled,…
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- CVE-2002-0640 — Critical (CVSS 10.0): Buffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large…
- CVE-2001-0144 — Critical (CVSS 10.0): CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH…
- CVE-2000-0999 — Critical (CVSS 10.0): Format string vulnerabilities in OpenBSD ssh program (and possibly other BSD-based operating systems) allow attackers…
- CVE-2000-0525 — Critical (CVSS 10.0): OpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute…
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