Vulnerability · Published Nov 11, 2021 · Assigned by Zoom

CVE-2021-34422Path traversal of file names in Keybase Client for Windows

High 7.2

In plain English

A high-severity security flaw in Keybase Client for Windows from Zoom Video Communications Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)1.4%top 27.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The Keybase Client for Windows before version 5.7.0 contains a path traversal vulnerability when checking the name of a file uploaded to a team folder. A malicious user could upload a file to a shared folder with a specially crafted file name which could allow a user to execute an application which was not intended on their host machine. If a malicious user leveraged this issue with the public folder sharing feature of the Keybase client, this could lead to remote code execution.

Affected products (as reported)

Vendor	Product	Versions
Zoom Video Communications Inc	Keybase Client for Windows	unspecified – before 5.7.0

References

https://explore.zoom.us/en/trust/security/security-bulletin x_refsource_MISC