CVE-2021-45461Restapps Vulnerability
FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021.
Published Dec 22, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2021-45461 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Restapps (Sangoma).
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Dec 22, 2021. No public exploit code is known.
- EPSS estimates a 21% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
21%
Higher than 97.6% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
51/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Dec 22, 2021
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
4
Reports of active use
Advisories And Exploit References
Description
FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Dec 22, 2021 | n/a | Not reported |
| Industry KEV feed | Dec 22, 2021 | n/a | Not reported |
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| RestappsSangoma | 15.0.19.87, 15.0.19.88, 16.0.18.40, 16.0.18.41 | n/a |
Timeline
Publicly disclosed
Dec 22, 2021
Added to CIRCL KEV
Dec 22, 2021
Added to Industry KEV feed
Dec 22, 2021
Last updated
Nov 21, 2024
References
- advisoryVulnCheck exploitation report
- advisorywiki.freepbx.org · 2021-12-21+SECURITY:+Potential+Rest+Phone+Apps+…
- exploitVulnCheck exploitation report
- exploitcommunity.freepbx.org · 80092
- exploitVulnCheck exploitation report
FAQ
Common Questions.
FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021.
Affected: Restapps (Sangoma) versions 15.0.19.87, 15.0.19.88, 16.0.18.40, 16.0.18.41. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Dec 22, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2021-45461 On Your Attack Surface?
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