Access Restriction Bypass Affecting openssh-debuginfo package, versions <0:6.6.1p1-22.58.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
36.27% (98th percentile)

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  • Snyk IDSNYK-AMZN201803-OPENSSHDEBUGINFO-1692561
  • published27 Sept 2021
  • disclosed3 Aug 2015

Introduced: 3 Aug 2015

CVE-2015-5600  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 openssh-debuginfo to version 0:6.6.1p1-22.58.amzn1 or higher.
This issue was patched in ALAS-2015-625.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-debuginfo package and not the openssh-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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

version 3.1