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Oracle Linux: (CVE-2023-2283) ELSA-2023-3839: libssh security update

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Oracle Linux: (CVE-2023-2283) ELSA-2023-3839: libssh security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/26/2023
Created
07/04/2023
Added
06/30/2023
Modified
06/30/2023

Description

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.

Solution(s)

  • oracle-linux-upgrade-libssh
  • oracle-linux-upgrade-libssh-config
  • oracle-linux-upgrade-libssh-devel

References

  • ELSA-2023-3839
  • CVE-2023-2283

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