Private file disclosure via unrestricted share provider
Published Feb 20, 2024 · Updated Aug 1, 2024
Information disclosure in Element Android 0.91.0 through 1.6.11 allows attackers to send private app files to a Matrix room. The exported IncomingShareActivity accepts a crafted ACTION_SEND intent whose EXTRA_STREAM URI makes MultiPickerFileProvider resolve the entire private files directory, then shares the selected file without consent. Exploitation requires a malicious third-party application on the same phone and an active Element session; encrypted databases have limited direct value, but unencrypted data such as the FCM token is exposed.
Summary
What happened
Information disclosure in Element Android 0.91.0 through 1.6.11 allows attackers to send private app files to a Matrix room. The exported IncomingShareActivity accepts a crafted ACTION_SEND intent whose EXTRA_STREAM URI makes MultiPickerFileProvider resolve the entire private files directory, then shares the selected file without consent. Exploitation requires a malicious third-party application on the same phone and an active Element session; encrypted databases have limited direct value, but unencrypted data such as the FCM token is exposed.
The record
- CVE
- CVE-2024-26132
- Published
- Feb 20, 2024
- Updated
- Aug 1, 2024
- Vendor
- Element HQ
- Product
- Element Android
- Classifications
- CWE-200, T1041
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 20, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 2024Record 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=>= 0.91.0, < 1.6.12
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
- Crafted IncomingShareActivity intent proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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