Vulnerability Details 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, 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 40.6%
CVSS Severity
CVSS v3 Score 7.5
References
- https://github.com/charmbracelet/soft-serve/commit/407c4ec72d1006cee1ff8c1775e5bcc091c2bc89
- https://github.com/charmbracelet/soft-serve/issues/389
- https://github.com/charmbracelet/soft-serve/releases/tag/v0.6.2
- https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-mc97-99j4-vm2v
- https://github.com/charmbracelet/soft-serve/commit/407c4ec72d1006cee1ff8c1775e5bcc091c2bc89
- https://github.com/charmbracelet/soft-serve/issues/389
- https://github.com/charmbracelet/soft-serve/releases/tag/v0.6.2
- https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-mc97-99j4-vm2v
Products affected by CVE-2023-43809
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cpe:2.3:a:charm:soft_serve:-
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cpe:2.3:a:charm:soft_serve:0.1.0
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cpe:2.3:a:charm:soft_serve:0.1.1
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cpe:2.3:a:charm:soft_serve:0.1.2
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cpe:2.3:a:charm:soft_serve:0.1.3
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cpe:2.3:a:charm:soft_serve:0.2.0
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cpe:2.3:a:charm:soft_serve:0.2.1
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cpe:2.3:a:charm:soft_serve:0.2.2
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cpe:2.3:a:charm:soft_serve:0.2.3
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cpe:2.3:a:charm:soft_serve:0.3.0
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cpe:2.3:a:charm:soft_serve:0.3.1
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cpe:2.3:a:charm:soft_serve:0.3.2
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cpe:2.3:a:charm:soft_serve:0.3.3
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cpe:2.3:a:charm:soft_serve:0.4.0
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cpe:2.3:a:charm:soft_serve:0.4.1
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cpe:2.3:a:charm:soft_serve:0.4.2
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cpe:2.3:a:charm:soft_serve:0.4.3
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cpe:2.3:a:charm:soft_serve:0.4.4
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cpe:2.3:a:charm:soft_serve:0.4.5
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cpe:2.3:a:charm:soft_serve:0.4.6
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cpe:2.3:a:charm:soft_serve:0.4.7
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cpe:2.3:a:charm:soft_serve:0.5.0
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cpe:2.3:a:charm:soft_serve:0.5.1
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cpe:2.3:a:charm:soft_serve:0.5.2
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cpe:2.3:a:charm:soft_serve:0.5.3
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cpe:2.3:a:charm:soft_serve:0.5.4
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cpe:2.3:a:charm:soft_serve:0.5.5
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cpe:2.3:a:charm:soft_serve:0.6.0
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cpe:2.3:a:charm:soft_serve:0.6.1