CVE-2011-0539
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
6.4 Medium
AI Score
Confidence
Low
0.007 Low
EPSS
Percentile
80.4%
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.
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| openbsd:openssh | openbsd openssh | eq | 5.6 |
| openbsd:openssh | openbsd openssh | eq | 5.7 |
References
h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
secunia.com/advisories/43181
secunia.com/advisories/44269
www.openssh.com/txt/legacy-cert.adv
www.openwall.com/lists/oss-security/2011/02/04/2
www.securityfocus.com/bid/46155
www.securitytracker.com/id?1025028
www.vupen.com/english/advisories/2011/0284
exchange.xforce.ibmcloud.com/vulnerabilities/65163
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
6.4 Medium
AI Score
Confidence
Low
0.007 Low
EPSS
Percentile
80.4%