CVE-2011-0539
HIGH
7.5
CVSS Score
Published: February 10, 2011 at 05:00 PM UTC
Updated: June 16, 2026 at 11:27 PM UTC
1 product affected across 1 vendorOpenSSH
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (10)
Vendor Advisoryx_refsource_HP
Source: [email protected]
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777x_refsource_CONFIRM
Source: [email protected]
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673Third Party Advisoryx_refsource_SECUNIAVendor Advisory
Source: [email protected]
http://secunia.com/advisories/43181x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
http://www.openssh.com/txt/legacy-cert.advMailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2011/02/04/2SSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-264CWE-457
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