CVE-2011-0539
7.5
HIGH
CVSS 3.1
EPSS 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.
How to fix CVE-2011-0539
To remediate CVE-2011-0539, upgrade the affected package to a fixed version below.
- Debian/openssh—upgrade to 1:5.8p1-2 or later
Is CVE-2011-0539 being exploited?
Low — EPSS is 2.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:5.8p1-2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |