CVE-2024-41996
Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE and validate the order of the public key.
- Score
- CVSS 3.1 7.5 High
- Status
- Deferred - cve@mitre.org
- Published
- 2024-08-26
- Last modified
- 2026-10-15
- Weaknesses
- CWE-295
Affected products
- Diffie-hellman Key Exchange (Diffie-hellman Key Exchange Project)
- 12xfo (Siemens)
- 24xsfp (Siemens)
- 2x10g (Siemens)
- 8xfo (Siemens)
- 8xsfp (Siemens)
- Cc (Siemens)
- Ruggedcom Rst2428p (Siemens)
- Scalance Xc-300xr-300xc-400xr-500wgxr-500 Family (Siemens)
- Scalance Xch328 (Siemens)
- Scalance Xcm324 (Siemens)
- Scalance Xcm328 (Siemens)
- Scalance Xcm332 (Siemens)
- Scalance Xrh334 24 V Dc (Siemens)
- Scalance Xrm334 230 V Ac (Siemens)
- Scalance Xrm334 230v Ac (Siemens)
- Scalance Xrm334 24 V Dc (Siemens)
- Scalance Xrm334 24v Dc (Siemens)
- Scalance Xrm334 2x230 V Ac (Siemens)
- Scalance Xrm334 2x230v Ac (Siemens)
- Sidis Prime (Siemens)
- Simatic S7-1500 Tm Mfp - Gnulinux Subsystem (Siemens)
References
- https://gist.github.com/c0r0n3r/abccc14d4d96c0442f3a77fa5ca255d1
- https://dheatattack.gitlab.io/details/
- https://dheatattack.gitlab.io/faq/
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html
- https://cert-portal.siemens.com/productcert/html/ssa-485750.html
