CVE-2001-0572
CVE-2001-0572 is a high-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 7.5)
- EPSS exploit prediction: 7% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Openbsd Openssh
- Published:
- Last modified:
Description
The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtain the following information via sniffing: (1) password lengths or ranges of lengths, which simplifies brute force password guessing, (2) whether RSA or DSA authentication is being used, (3) the number of authorized_keys in RSA authentication, or (4) the lengths of shell commands.
Frequently asked questions
- What is CVE-2001-0572?
- The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtain the following information via sniffing: (1) password lengths or ranges of lengths, which simplifies brute force password guessing, (2) whether RSA or DSA authentication is being used, (3) the number of authorized_keys in RSA authentication, or (4) the lengths of shell commands.
- How severe is CVE-2001-0572?
- CVE-2001-0572 has a CVSS 2.0 base score of 7.5, rated high severity.
- Is CVE-2001-0572 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2001-0572?
- CVE-2001-0572 primarily affects Openbsd Openssh. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2001-0572?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2001-0572 published?
- CVE-2001-0572 was published on 2001-08-22 and last updated on 2026-06-16.
References
- http://archives.neohapsis.com/archives/bugtraq/2001-03/0225.html
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000391
- http://www.kb.cert.org/vuls/id/596827
- http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-033.php3
- http://www.redhat.com/support/errata/RHSA-2001-033.html
Affected products (9)
- cpe:2.3:a:openbsd:openssh:4.5:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:*
- cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:*
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