CVE-2011-0539

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.

Score

CVSS 3.1 7.5 High

Status

Modified - secalert@redhat.com

Published

2011-02-10

Last modified

2026-05-29

Weaknesses

CWE-264, CWE-457

Affected products

• Openssh (Openbsd)

References

• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
• http://secunia.com/advisories/43181
• http://secunia.com/advisories/44269
• http://www.openssh.com/txt/legacy-cert.adv
• 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
• https://exchange.xforce.ibmcloud.com/vulnerabilities/65163