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Amazon Linux AMI 2: CVE-2019-6111: Security patch for openssh (ALAS-2019-1216)

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Amazon Linux AMI 2: CVE-2019-6111: Security patch for openssh (ALAS-2019-1216)

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:P)
Published
01/31/2019
Created
05/08/2020
Added
04/27/2020
Modified
09/30/2022

Description

An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).

Solution(s)

  • amazon-linux-ami-2-upgrade-openssh
  • amazon-linux-ami-2-upgrade-openssh-askpass
  • amazon-linux-ami-2-upgrade-openssh-cavs
  • amazon-linux-ami-2-upgrade-openssh-clients
  • amazon-linux-ami-2-upgrade-openssh-debuginfo
  • amazon-linux-ami-2-upgrade-openssh-keycat
  • amazon-linux-ami-2-upgrade-openssh-ldap
  • amazon-linux-ami-2-upgrade-openssh-server
  • amazon-linux-ami-2-upgrade-openssh-server-sysvinit
  • amazon-linux-ami-2-upgrade-pam_ssh_agent_auth

References

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