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Amazon Linux AMI: Security patch for openssh (ALAS-2015-625) (multiple CVEs)

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Amazon Linux AMI: Security patch for openssh (ALAS-2015-625) (multiple CVEs)

Severity
9
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:C)
Published
08/02/2015
Created
07/25/2018
Added
12/18/2015
Modified
07/04/2017

Description

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.

Solution(s)

  • amazon-linux-upgrade-openssh
  • amazon-linux-upgrade-openssh-clients
  • amazon-linux-upgrade-openssh-debuginfo
  • amazon-linux-upgrade-openssh-keycat
  • amazon-linux-upgrade-openssh-ldap
  • amazon-linux-upgrade-openssh-server
  • amazon-linux-upgrade-pam_ssh_agent_auth

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