CVE-2011-0539

high

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/65163

http://www.vupen.com/english/advisories/2011/0284

http://www.securitytracker.com/id?1025028

http://www.securityfocus.com/bid/46155

http://www.openwall.com/lists/oss-security/2011/02/04/2

http://www.openssh.com/txt/legacy-cert.adv

http://secunia.com/advisories/44269

http://secunia.com/advisories/43181

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777

Details

Source: Mitre, NVD

Published: 2011-02-10

Updated: 2017-08-17

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High