Missing Critical Step in Authentication Affecting openssh-askpass package, versions <0:6.6.1p1-22.el7


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
36.27% (98th percentile)

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  • Snyk IDSNYK-RHEL7-OPENSSHASKPASS-7997509
  • published17 Sept 2024
  • disclosed16 Jul 2015

Introduced: 16 Jul 2015

CVE-2015-5600  (opens in a new tab)
CWE-304  (opens in a new tab)

How to fix?

Upgrade RHEL:7 openssh-askpass to version 0:6.6.1p1-22.el7 or higher.
This issue was patched in RHSA-2015:2088.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-askpass package and not the openssh-askpass package as distributed by RHEL. See How to fix? for RHEL:7 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

CVSS Scores

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