Vulnerability · Published Aug 10, 2023 · Assigned by GitHub_M

CVE-2023-39957Path traversal allows tricking the Talk Android app into writing files into it's root directory

High 7.2

In plain English

A high-severity path traversal in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.0)7.2High

Exploit odds (30 days)0.4%top 69.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Nextcloud Talk Android allows users to place video and audio calls through Nextcloud on Android. Prior to version 17.0.0, an unprotected intend allowed malicious third party apps to trick the Talk Android app into writing files outside of its intended cache directory. Nextcloud Talk Android version 17.0.0 has a patch for this issue. No known workarounds are available.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	< 17.0.0

Weakness: CWE-22 · Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-36f7-93f3-mcfj x_refsource_CONFIRM
https://github.com/nextcloud/talk-android/pull/3064 x_refsource_MISC
https://hackerone.com/reports/1997029 x_refsource_MISC