CVE-2023-2538 TLS Private Key Accessible to External Parties
Unauthenticated attackers can retrieve TLS private keys from the BMC web interface, enabling Man-in-the-Middle attacks against HTTPS connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-2538?
CVE-2023-2538 is a medium-severity vulnerability in tyan s5552_bmc, published on 5 Jul 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A CWE-552 "Files or Directories Accessible to External Parties” in the web interface of the Tyan S5552 BMC version 3.00 allows an unauthenticated remote attacker to retrieve the private key of the TLS certificate in use by the BMC via forced browsing. This can then be abused to perform Man-in-the-Middle (MitM) attacks against victims that access the web interface through HTTPS.
Weakness: CWE-552
Which versions are affected by CVE-2023-2538?
It affects 4 products.
Products include Tyan S5552\/S5552gm2nr Firmware, Tyan S5552\/S5552gm4nr Firmware, Tyan S5552\/S5552wgm4nr-Ex Firmware, Tyan S5552\/S5552wgm4nr Firmware.
How do I fix CVE-2023-2538?
No fix has been published for CVE-2023-2538 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-2538 being exploited?
There is no known exploitation of CVE-2023-2538 in the wild and no public exploit code.
Sources
Also known as GHSA-4m78-wr94-p294.