SB2020052130 - Information disclosure in Signal Private Messenger for iOS and Android
Published: May 21, 2020
Security Bulletin ID
SB2020052130
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Information disclosure (CVE-ID: CVE-2020-5753)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to application discloses currently used DNS server to arbitrary user from non-contact list. The issue is related to how WebRTC processes ICE Candidates, which takes place before a user decides to answer an incoming Signal call. A remote attacker can gain access to victim's current DNS server IP address and based on this data uncover victim's geographical location.
Remediation
Install update from vendor's website.