CVE-2011-4327

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Summary

CVECVE-2011-4327
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2014-02-03 03:55:03 UTC
Updated2026-05-29 21:16:24 UTC
Descriptionssh-keysign.c in ssh-keysign in OpenSSH before 5.8p2 on certain platforms executes ssh-rand-helper with unintended open file descriptors, which allows local users to obtain sensitive key information via the ptrace system call.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.001210000 probability, percentile 0.307130000 (date 2026-06-03)

Problem Types: CWE-200 | n/a | CWE-200 CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:L/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openbsd Openssh 1.2 All All All
Application Openbsd Openssh 1.2.1 All All All
Application Openbsd Openssh 1.2.2 All All All
Application Openbsd Openssh 1.2.27 All All All
Application Openbsd Openssh 1.2.3 All All All
Application Openbsd Openssh 1.3 All All All
Application Openbsd Openssh 1.5 All All All
Application Openbsd Openssh 1.5.7 All All All
Application Openbsd Openssh 1.5.8 All All All
Application Openbsd Openssh 2 All All All
Application Openbsd Openssh 2.1 All All All
Application Openbsd Openssh 2.1.1 All All All
Application Openbsd Openssh 2.2 All All All
Application Openbsd Openssh 2.3 All All All
Application Openbsd Openssh 2.3.1 All All All
Application Openbsd Openssh 2.5 All All All
Application Openbsd Openssh 2.5.1 All All All
Application Openbsd Openssh 2.5.2 All All All
Application Openbsd Openssh 2.9 All All All
Application Openbsd Openssh 2.9.9 All All All
Application Openbsd Openssh 2.9.9p2 All All All
Application Openbsd Openssh 2.9p1 All All All
Application Openbsd Openssh 2.9p2 All All All
Application Openbsd Openssh 3.0 All All All
Application Openbsd Openssh 3.0.1 All All All
Application Openbsd Openssh 3.0.1p1 All All All
Application Openbsd Openssh 3.0.2 All All All
Application Openbsd Openssh 3.0.2p1 All All All
Application Openbsd Openssh 3.0p1 All All All
Application Openbsd Openssh 3.1 All All All
Application Openbsd Openssh 3.1p1 All All All
Application Openbsd Openssh 3.2 All All All
Application Openbsd Openssh 3.2.2 All All All
Application Openbsd Openssh 3.2.2p1 All All All
Application Openbsd Openssh 3.2.3p1 All All All
Application Openbsd Openssh 3.3 All All All
Application Openbsd Openssh 3.3p1 All All All
Application Openbsd Openssh 3.4 All All All
Application Openbsd Openssh 3.4p1 All All All
Application Openbsd Openssh 3.5 All All All
Application Openbsd Openssh 3.5p1 All All All
Application Openbsd Openssh 3.6 All All All
Application Openbsd Openssh 3.6.1 All All All
Application Openbsd Openssh 3.6.1p1 All All All
Application Openbsd Openssh 3.6.1p2 All All All
Application Openbsd Openssh 3.7 All All All
Application Openbsd Openssh 3.7.1 All All All
Application Openbsd Openssh 3.7.1p1 All All All
Application Openbsd Openssh 3.7.1p2 All All All
Application Openbsd Openssh 3.8 All All All
Application Openbsd Openssh 3.8.1 All All All
Application Openbsd Openssh 3.8.1p1 All All All
Application Openbsd Openssh 3.9 All All All
Application Openbsd Openssh 3.9.1 All All All
Application Openbsd Openssh 3.9.1p1 All All All
Application Openbsd Openssh 4.0 All All All
Application Openbsd Openssh 4.0p1 All All All
Application Openbsd Openssh 4.1 All All All
Application Openbsd Openssh 4.1p1 All All All
Application Openbsd Openssh 4.2 All All All
Application Openbsd Openssh 4.2p1 All All All
Application Openbsd Openssh 4.3 All All All
Application Openbsd Openssh 4.3p1 All All All
Application Openbsd Openssh 4.3p2 All All All
Application Openbsd Openssh 4.4 All All All
Application Openbsd Openssh 4.4p1 All All All
Application Openbsd Openssh 4.5 All All All
Application Openbsd Openssh 4.6 All All All
Application Openbsd Openssh 4.7 All All All
Application Openbsd Openssh 4.8 All All All
Application Openbsd Openssh 4.9 All All All
Application Openbsd Openssh 5.0 All All All
Application Openbsd Openssh 5.1 All All All
Application Openbsd Openssh 5.2 All All All
Application Openbsd Openssh 5.3 All All All
Application Openbsd Openssh 5.4 All All All
Application Openbsd Openssh 5.5 All All All
Application Openbsd Openssh 5.6 All All All
Application Openbsd Openssh 5.7 All All All
Application Openbsd Openssh All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Bug 755640 – CVE-2011-4327 openssh: Unauthorized local access to host keys on platforms where ssh-rand-helper used af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
www.openssh.com/txt/portable-keysign-rand-helper.adv af854a3a-2127-422b-91ae-364da2661108 www.openssh.com Vendor Advisory
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