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CVE-2011-0539

Date: February 10, 2011

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.

Severity Score

Related Resources (12)

http://www.openssh.com/txt/legacy-cert.adv
http://www.securityfocus.com/bid/46155
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
http://www.openwall.com/lists/oss-security/2011/02/04/2
http://secunia.com/advisories/43181
http://www.vupen.com/english/advisories/2011/0284
http://www.securitytracker.com/id?1025028
https://exchange.xforce.ibmcloud.com/vulnerabilities/65163
https://nvd.nist.gov/vuln/detail/CVE-2011-0539
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
http://secunia.com/advisories/44269
https://www.mend.io/vulnerability-database/CVE-2011-0539

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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