CVE-2023-52081

ffcss is a CLI interface to apply and configure Firefox CSS themes. Prior to 0.2.0, the function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the regex `[-_ .]`. However, due to the use of late Unicode normalization of type NFKD, it is possible to bypass that validation and re-introduce all the characters in the regex `[-_ .]`. The `lookupPreprocess()` can be easily bypassed with equivalent Unicode characters like U+FE4D (﹍), which would result in the omitted U+005F (_), for instance. The `lookupPreprocess()` function is only ever used to search for themes loosely (case insensitively, while ignoring dashes, underscores and dots), so the actual security impact is classified as low. This vulnerability is fixed in 0.2.0. There are no known workarounds.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc	Patch
https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ewen-lbh:firefox_css:*:*:*:*:*:go:*:*

History

No history.

Information

Published : 2023-12-28 16:16

Updated : 2024-02-29 01:42

NVD link : CVE-2023-52081

Mitre link : CVE-2023-52081

CVE.ORG link : CVE-2023-52081

JSON object : View

Products Affected

ewen-lbh

firefox_css

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-176

Improper Handling of Unicode Encoding

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