CVEvulnerability
CVE-2022-28345
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-04-15
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-74
Description
The Signal app before 5.34 for iOS allows URI spoofing via RTLO injection. It incorrectly renders RTLO encoded URLs beginning with a non-breaking space, when there is a hash character in the URL. This technique allows a remote unauthenticated attacker to send legitimate looking links, appearing to be any website URL, by abusing the non-http/non-https automatic rendering of URLs. An attacker can spoof, for example, example.com, and masquerade any URL with a malicious destination. An attacker requires a subdomain such as gepj, txt, fdp, or xcod, which would appear backwards as jpeg, txt, pdf, and docx respectively.
Affected configurations
• signal signal (< 5.34)
Related
Weakness · CWE (1)
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component weakness
References
- https://blog.malwarebytes.com/social-engineering/2022/03/uri-spoofing-flaw-could-phish-whatsapp-signal-instagram-and-imessage-users/ Third Party Advisory
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-42.md Exploit, Patch, Third Party Advisory
- https://github.com/zadewg/RIUS Third Party Advisory
- https://sick.codes/sick-2022-42 Exploit, Patch, Third Party Advisory
- https://blog.malwarebytes.com/social-engineering/2022/03/uri-spoofing-flaw-could-phish-whatsapp-signal-instagram-and-imessage-users/ Third Party Advisory
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-42.md Exploit, Patch, Third Party Advisory
- https://github.com/zadewg/RIUS Third Party Advisory
- https://sick.codes/sick-2022-42 Exploit, Patch, Third Party Advisory