Advisory Details

May 29th, 2024

(Pwn2Own) Phoenix Contact CHARX SEC-3100 Untrusted Search Path Local Privilege Escalation Vulnerability

ZDI-24-519
ZDI-CAN-23419

CVE ID CVE-2024-28133
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 devices. 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 charx_set_timezone binary. The issue results from executing a program from an untrusted location. 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 Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam)
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