Access Restriction Bypass Affecting openssh package, versions <1:5.8p1-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.7% (81st percentile)

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  • Snyk IDSNYK-DEBIAN12-OPENSSH-1556008
  • published10 Feb 2011
  • disclosed10 Feb 2011

Introduced: 10 Feb 2011

CVE-2011-0539  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Debian:12 openssh to version 1:5.8p1-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.

CVSS Scores

version 3.1