Advisory Details

May 29th, 2024

Phoenix Contact CHARX SEC-3100 Link Following Local Privilege Escalation Vulnerability

ZDI-24-523
ZDI-CAN-20923

CVE ID CVE-2024-28137
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Phoenix Contact
AFFECTED PRODUCTS CHARX SEC-3100
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Phoenix Contact CHARX SEC-3100 charging controllers. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the /etc/init.d/user-applications script. By creating a symbolic link, an attacker can abuse the script to change ownership of arbitrary files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

ADDITIONAL DETAILS Phoenix Contact has issued an update to correct this vulnerability. More details can be found at:
https://cert.vde.com/en/advisories/VDE-2024-019/
DISCLOSURE TIMELINE
  • 2024-02-21 - Vulnerability reported to vendor
  • 2024-05-29 - Coordinated public release of advisory
CREDIT Todd Manning
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