The modprobe child process in the ./debian/patches/load_ppp_generic_if_needed patch file incorrectly handled module loading. A local non-root attacker could exploit the MODPROBE_OPTIONS environment variable to read arbitrary root files. Fixed in 2.4.5-5ubuntu1.4, 2.4.5-5.1ubuntu2.3+esm2, 2.4.7-1+2ubuntu1.16.04.3, 2.4.7-2+2ubuntu1.3, 2.4.7-2+4.1ubuntu5.1, 2.4.7-2+4.1ubuntu6. Was ZDI-CAN-11504.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15704
Reference (s):
- UBUNTU:https://ubuntu.com/security/notices/USN-4451-1
- URL: https://ubuntu.com/security/notices/USN-4451-1
- UBUNTU:https://ubuntu.com/security/notices/USN-4451-2
- URL: https://ubuntu.com/security/notices/USN-4451-2