CVE-2023-43494: Medium severity jenkins lts vulnerability

Jenkins allows filtering builds in the build history widget by specifying an expression that searches for matching builds by name, description, parameter values, etc.

Jenkins 2.50 through 2.423 (both inclusive), LTS 2.60.1 through 2.414.1 (both inclusive) does not exclude sensitive build variables (e.g., password parameter values) from this search.

This allows attackers with Item/Read permission to obtain values of sensitive variables used in builds by iteratively testing different characters until the correct sequence is discovered.

Jenkins 2.424, LTS 2.414.2 excludes sensitive variables from this search.

Jenkins weekly and LTS could allow a remote authenticated attacker to obtain sensitive information, caused by not excluding sensitive build variables when filtering builds in the build history widget. By sending a specially crafted request, an attacker could exploit this vulnerability to obtain values of sensitive variables used in builds, and use this information to launch further attacks against the affected system.

— IBM