Auth bypass in OpenBSD OpenSSH
CVE-2010-4478
OpenSSH 5.6 and earlier, when J-PAKE is enabled, does not properly validate the public parameters in the J-PAKE protocol, which allows remote attackers to bypass the need for knowledge of the shared secret, and successfully authenticate, by sending crafted values in each round of the protocol, a related issue to CVE-2010-4252.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.042 (90.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000
Affected products
- OpenBSD OpenSSH — versions 3.0.1p1, 3.9.1, 2.5.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c (Patch)
- kb.juniper.net/InfoCenter/index
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:12338 (signature, vdb-entry)
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/jpake.c.diff
- github.com/seb-m/jpake
- bugzilla.redhat.com/show_bug.cgi (Patch)
- seb.dbzteam.org/crypto/jpake-session-key-retrieval.pdf (Exploit)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
Frequently asked questions
- What is CVE-2010-4478?
- CVE-2010-4478 is a critical-severity vulnerability in OpenBSD OpenSSH, classified under Improper Authentication. CVSS score: 9.8/10. Published 2010-12-06.
- How severe is CVE-2010-4478?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2010-4478 known to be exploited?
- 40 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.