CVE-2023-43809: Soft Serve is a self-hostable Git server for the command line. Prior to version 0.6.2, a security vulnerability in Soft Serve could allow an unauthenticated…

PriorityP351high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EPSS

0.89%

54.8th percentile

Soft Serve is a self-hostable Git server for the command line. Prior to version 0.6.2, a security vulnerability in Soft Serve could allow an unauthenticated, remote attacker to bypass public key authentication when keyboard-interactive SSH authentication is active, through the `allow-keyless` setting, and the public key requires additional client-side verification for example using FIDO2 or GPG. This is due to insufficient validation procedures of the public key step during SSH request handshake, granting unauthorized access if the keyboard-interaction mode is utilized. An attacker could exploit this vulnerability by presenting manipulated SSH requests using keyboard-interactive authentication mode. This could potentially result in unauthorized access to the Soft Serve. Users should upgrade to the latest Soft Serve version `v0.6.2` to receive the patch for this issue. To workaround this vulnerability without upgrading, users can temporarily disable Keyboard-Interactive SSH Authentication using the `allow-keyless` setting.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
charm	soft_serve	< 0.6.2	0.6.2
charmbracelet	soft-serve	< 0.6.2	0.6.2
github.com	charmbracelet_soft-serve	>= 0 < 0.6.2	0.6.2

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