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CVE-2024-8158

Sept. 12, 2024, 9 p.m.

CVSS Score

6.5 / 10

Products Impacted

Vendor Product Versions
9front
  • lib9p
  • *

Description

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.

Weaknesses

CWE-639
Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

CWE ID: 639

Date

Published: Aug. 25, 2024, 10:15 p.m.

Last Modified: Sept. 12, 2024, 9 p.m.

Status : Analyzed

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

1d66c9f9-fff2-411a-aa19-ca6312fa25e9

CPEs

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a 9front lib9p / / / / / / / /

CVSS Data

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

Base Score
6.5
Exploitability Score
2.8
Impact Score
3.6
Base Severity
MEDIUM
CVSS Vector String

The CVSS vector string provides an in-depth view of the vulnerability metrics.

View Vector String

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

https://git.9front.org/ 1d66c9f9-fff2-411a-aa19-ca6312fa25e9