Directory path disclosure via incorrect channel URI
Published Jun 2, 2023 · Updated Jan 9, 2025
Information disclosure in Mozilla Firefox and Android variants before 112 allows attackers to read local directory paths through a WebExtension. DocumentLoadListener's call path uses nsIChannel::GetURI rather than NS_GetFinalChannelURI, exposing a translated jar:file URI instead of the original moz-extension URI. Exploitation requires a WebExtension load or redirect flow and user interaction; it reveals filesystem directory structure without modifying files or interrupting the browser.
Summary
What happened
Information disclosure in Mozilla Firefox and Android variants before 112 allows attackers to read local directory paths through a WebExtension. DocumentLoadListener's call path uses nsIChannel::GetURI rather than NS_GetFinalChannelURI, exposing a translated jar:file URI instead of the original moz-extension URI. Exploitation requires a WebExtension load or redirect flow and user interaction; it reveals filesystem directory structure without modifying files or interrupting the browser.
The record
- CVE
- CVE-2023-29538
- Published
- Jun 2, 2023
- Updated
- Jan 9, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-668, T1083
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 2, 2023CVE publishedPublication date reported by the CVE source.
- Jan 9, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <112
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Mozilla WebExtension redirect test caseproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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