Arbitrary file write via unsanitized Giphy identifier
Published Jun 8, 2020 · Updated Aug 4, 2024
Path traversal in Zoom Client Application 4.6.10 allows remote authenticated users to write arbitrary files through crafted GIF chat messages. The Giphy XMPP handler fetches an attacker-controlled URL and uses the unsanitized giphy id as the cache filename, allowing traversal outside Zoom's data directory. A sender must reach the target through individual or group chat; Zoom appends _BigPic.gif, while Windows NTFS alternate streams permit an empty arbitrary-extension file.
Summary
What happened
Path traversal in Zoom Client Application 4.6.10 allows remote authenticated users to write arbitrary files through crafted GIF chat messages. The Giphy XMPP handler fetches an attacker-controlled URL and uses the unsanitized giphy id as the cache filename, allowing traversal outside Zoom's data directory. A sender must reach the target through individual or group chat; Zoom appends _BigPic.gif, while Windows NTFS alternate streams permit an empty arbitrary-extension file.
The record
- CVE
- CVE-2020-6109
- Published
- Jun 8, 2020
- Updated
- Aug 4, 2024
- Vendor
- Zoom Video Communications, Inc.
- Product
- Zoom Workplace Desktop App
- Classifications
- CWE-22, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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=Zoom Client Application 4.6.10
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 Giphy XMPP traversal stanzaproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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