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SUSE: CVE-2019-25017: SUSE Linux Security Advisory

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SUSE: CVE-2019-25017: SUSE Linux Security Advisory

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:P)
Published
02/02/2021
Created
02/23/2021
Added
02/20/2021
Modified
05/11/2021

Description

An issue was discovered in rcp in MIT krb5-appl through 1.0.3. Due to the rcp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the rcp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious rcp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the rcp 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). This issue is similar to CVE-2019-6111 and CVE-2019-7283. NOTE: MIT krb5-appl is not supported upstream but is shipped by a few Linux distributions. The affected code was removed from the supported MIT Kerberos 5 (aka krb5) product many years ago, at version 1.8.

Solution(s)

  • suse-upgrade-krb5-appl-clients
  • suse-upgrade-krb5-appl-servers

References

  • SUSE-SU-2021:0527-1
  • CVE-2019-25017

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