CVE-2023-28113

Public Exploit
russh may use insecure Diffie-Hellman keys

Description

russh is a Rust SSH client and server library. Starting in version 0.34.0 and prior to versions 0.36.2 and 0.37.1, Diffie-Hellman key validation is insufficient, which can lead to insecure shared secrets and therefore breaks confidentiality. Connections between a russh client and server or those of a russh peer with some other misbehaving peer are most likely to be problematic. These may vulnerable to eavesdropping. Most other implementations reject such keys, so this is mainly an interoperability issue in such a case. This issue is fixed in versions 0.36.2 and 0.37.1

Categories

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory github.com
Affected: warp-tech russh
Published at:
Updated at:

References

Link Tags
https://github.com/warp-tech/russh/commit/d831a3716d3719dc76f091fcea9d94bd4ef97c6e patch
https://github.com/warp-tech/russh/blob/master/russh/src/kex/dh/groups.rs#L72-L76 product
https://github.com/warp-tech/russh/blob/master/russh/src/kex/dh/groups.rs#L78-L81 product
https://github.com/warp-tech/russh/releases/tag/v0.36.2 release notes
https://github.com/warp-tech/russh/releases/tag/v0.37.1 release notes
https://github.com/warp-tech/russh/security/advisories/GHSA-cqvm-j2r2-hwpg exploit vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-28113?
CVE-2023-28113 has been scored as a medium severity vulnerability.
How to fix CVE-2023-28113?
To fix CVE-2023-28113, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28113 being actively exploited in the wild?
It is possible that CVE-2023-28113 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28113?
CVE-2023-28113 affects warp-tech russh.
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