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Access Restriction Bypass Affecting openssh package, versions <1:6.9p1-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 16.44% (96th percentile)
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NVD
8.2 high
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Red Hat
4.3 medium

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  • Snyk ID SNYK-DEBIAN11-OPENSSH-519380
  • published 3 Aug 2015
  • disclosed 3 Aug 2015
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Introduced: 3 Aug 2015

CVE-2015-5600 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade Debian:11 openssh to version 1:6.9p1-1 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:11 relevant fixed versions and status.

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

References