CVE-2024-52288 RMAC revert to the beginning of the session in libosdp
A Man-in-the-Middle attacker can replay OSDP messages by resetting the RMAC state, bypassing security checks in libosdp.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-52288?
CVE-2024-52288 is a medium-severity vulnerability in goToMain libosdp, published on 11 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
libosdp is an implementation of IEC 60839-11-5 OSDP (Open Supervised Device Protocol) and provides a C library with support for C++, Rust and Python3. In affected versions an unexpected `REPLY_CCRYPT` or `REPLY_RMAC_I` may be introduced into an active stream when they should not be. Once RMAC_I message can be sent during a session, attacker with MITM access to the communication may intercept the original RMAC_I reply and save it. While the session continues, the attacker will record all of the replies and save them, till capturing the message to be replied (can be detected by ID, length or time based on inspection of visual activity next to the reader) Once attacker captures a session with the message to be replayed, he stops resetting the connection and waits for signal to perform the replay to of the PD to CP message (ex: by signaling remotely to the MIMT device or setting a specific timing). In order to replay, the attacker will craft a specific RMAC_I message in the proper seq of the execution, which will result in reverting the RMAC to the beginning of the session. At that phase - attacker can replay all the messages from the beginning of the session. This issue has been addressed in commit `298576d9` which is included in release version 3.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness: CWE-924
Which versions are affected by CVE-2024-52288?
3 open source packages ship an affected version, including libosdp.
| Package | Affected | Fixed in |
|---|---|---|
libosdp PyPI | All versions | 3.0.0 |
libosdp PyPI | All versions | 3.0.0 |
libosdp PyPI | All versions | 3.0.0 |
How do I fix CVE-2024-52288?
Upgrade libosdp to 3.0.0 or later.
Is CVE-2024-52288 being exploited?
There is no known exploitation of CVE-2024-52288 in the wild and no public exploit code.
Sources
Also known as GHSA-xhjw-7vh5-qxqm, PYSEC-2026-1535.