High severity · published Oct 16, 2020
CVE-2020-15258
In Wire before 3.20.x, `shell.openExternal` was used without checking the URL
8.0
CVSS
2.1%
EPSS
No
On KEV
Description
In Wire before 3.20.x, `shell.openExternal` was used without checking the URL. This vulnerability allows an attacker to execute code on the victims machine by sending messages containing links with arbitrary protocols. The victim has to interact with the link and sees the URL that is opened. The issue was patched by implementing a helper function which checks if the URL's protocol is common. If it is common, the URL will be opened externally. If not, the URL will not be opened and a warning appears for the user informing them that a probably insecure URL was blocked from being executed. The issue is patched in Wire 3.20.x. More technical details about exploitation are available in the linked advisory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WI
Wire · Wire
before 3.20.2934 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15258
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15258
Exploit
https://benjamin-altpeter.de/shell-openexternal-dangers/
Patch
https://github.com/wireapp/wire-desktop/commit/b3705fffa75a03f055530f55a754face5ac0623b
Exploit
https://github.com/wireapp/wire-desktop/security/advisories/GHSA-5gpx-9976-ggpm
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