CVE Vulnerabilities

CVE-2018-20936

Incorrect Permission Assignment for Critical Resource

Published: Aug 01, 2019 | Modified: Aug 24, 2020
CVSS 3.x
3.3
LOW
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu

cPanel before 68.0.27 allows attackers to read the SRS secret via exim.conf (SEC-308).

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Cpanel Cpanel 61.9999.55 (including) 62.0.39 (excluding)
Cpanel Cpanel 65.9999.38 (including) 66.0.35 (excluding)
Cpanel Cpanel 67.9999.64 (including) 68.0.27 (excluding)

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References