CVE-2011-0539

HIGH

OpenSSH 5.6-5.7 - Information Disclosure via Uninitialized Nonce in Legacy Certificate Generation

Title source: llm
STIX 2.1

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 (10)

Core 10
Core References
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2011/02/04/2
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1025028
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/46155
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0284
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/43181
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/44269
Patch, Vendor Advisory x_refsource_confirm
http://www.openssh.com/txt/legacy-cert.adv
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/65163

Scores

CVSS v3 7.5
EPSS 0.0180
EPSS Percentile 75.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-264 CWE-457
Status published
Products (2)
openbsd/openssh 5.6
openbsd/openssh 5.7
Published Feb 10, 2011
Tracked Since Feb 18, 2026