CVE-2024-8158

A bug in the 9p authentication implementation within lib9p allows an attacker with an existing valid user within the configured auth server to impersonate any other valid filesystem user. This is due to lib9p not properly verifying that the uname given in the Tauth and Tattach 9p messages matches the client UID returned from the factotum authentication handshake. The only filesystem making use of these functions within the base 9front systems is the experimental hjfs disk filesystem, other disk filesystems (cwfs and gefs) are not affected by this bug. This bug was inherited from Plan 9 and is present in all versions of 9front and is remedied fully in commit 9645ae07eb66a59015e3e118d0024790c37400da.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://git.9front.org/plan9front/plan9front/07aa9bfeef55ca987d411115adcfbbd4390ecf34/commit.html	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:9front:lib9p:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2024-08-25 22:15

Updated : 2024-09-12 21:00

NVD link : CVE-2024-8158

Mitre link : CVE-2024-8158

CVE.ORG link : CVE-2024-8158

JSON object : View

Products Affected

9front

lib9p

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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