National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2011-0539 Detail

Current Description

The key_certify function in usr.bin/ssh/key.c in OpenSSH 5.6 and 5.7, when generating legacy certificates using the -t command-line option in ssh-keygen, does not initialize the nonce field, which might allow remote attackers to obtain sensitive stack memory contents or make it easier to conduct hash collision attacks.

Source:  MITRE
View Analysis Description

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
http://www.openssh.com/txt/legacy-cert.adv Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2011/02/04/2
http://www.securityfocus.com/bid/46155
http://www.securitytracker.com/id?1025028
http://www.vupen.com/english/advisories/2011/0284 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/65163

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Controls (CWE-264)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:openbsd:openssh:5.6:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:openbsd:openssh:5.7:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2011-0539
NVD Published Date:
02/10/2011
NVD Last Modified:
08/16/2017