Impact/Pulse/First: Authorization Bypass Through User-Controlled Key
CVE-2023-53955 is a critical-severity authorization bypass through user-controlled key vulnerability in Impact/Pulse/First from Sound4, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Impact/Pulse/First versions: Version 2: 1.1/2.15. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.85% chance of exploitation within 30 days, higher than 59% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of Impact/Pulse/First you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SOUND4 | Impact/Pulse/First | Version 2: 1.1/2.15 | Not stated |
| SOUND4 | Impact/Pulse Eco | 1.16 | Not stated |
| SOUND4 | BigVoice4 | 1.2 | Not stated |
| SOUND4 | BigVoice2 | 1.30 | Not stated |
| SOUND4 | Stream | 1.1/2.4.29 | Not stated |
| Kantar Media | WM2 | 1.11 | Not stated |
| Sound4 | Stream Extension | 2.4.29 | Not stated |
| Sound4 | Wm2 Firmware | 1.11 | Not stated |
| Sound4 | Big Voice2 Firmware | 1.30 | Not stated |
| Sound4 | Big Voice4 Firmware | 1.2 | Not stated |
| Sound4 | Pulse Eco Firmware | 1.16 | Not stated |
| Sound4 | Impact Eco Firmware | 1.16 | Not stated |
| Sound4 | First Firmware | 1.69; 2.15 | Not stated |
| Sound4 | Pulse Firmware | 1.69; 2.15 | Not stated |
| Sound4 | Impact Firmware | 1.69; 2.15 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.3 | Critical | CNA (vulncheck.com) |
| CVSS 3.1 | 9.8 | Critical | CNA (vulncheck.com) |
Official description
SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an insecure direct object reference vulnerability that allows attackers to bypass authorization and access hidden system resources. Attackers can exploit the vulnerability by manipulating user-supplied input to execute privileged functionalities without proper authentication.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
How developers prevent this class of flaw
- For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
- Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
- Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
More Authorization Bypass Through User-Controlled Key vulnerabilities (CWE-639)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
Technical write-ups (may include proof of concept)
- exploit-db.com/exploits/51169Exploit, Third Party Advisory, VDB Entry
- zeroscience.mk/en/vulnerabilities/ZSL-2022-5723.phpExploit, Third Party Advisory
Other references
Other vulnerabilities in Impact/Pulse/First
- 9.8 Critical severity
- 7.8 High severity
- 9.8 Critical severity
- 8.8 High severity
- 7.5 High severity
- 7.8 High severity
Recent Authorization Bypass Through User-Controlled Key vulnerabilities
- 7.5 High severity
- 9.3 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 8.1 High severity
- 8.8 High severity
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