Call Blocker: Insecure Storage of Sensitive Information
CVE-2023-29727 is a critical-severity insecure storage of sensitive information vulnerability in Call Blocker from Applika, 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 Call Blocker versions: 6.6.3. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.21% chance of exploitation within 30 days, higher than 69% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of Call Blocker 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 |
|---|---|---|---|
| Applika | Call Blocker | 6.6.3 | Not stated |
Version data comes from NVD's product matching. 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 NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.1 | 9.8 | Critical | CISA (ADP) |
Official description
The Call Blocker application 6.6.3 for Android allows unauthorized applications to use exposed components to delete data stored in its database that is related to user privacy settings and affects the implementation of the normal functionality of the application. An attacker can use this to cause an escalation of privilege attack.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Insecure Storage of Sensitive Information
The product stores sensitive information without properly limiting read or write access by unauthorized actors.
More Insecure Storage of Sensitive Information vulnerabilities (CWE-922)
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
Technical write-ups (may include proof of concept)
- github.com/LianKee/SO-CVEs/blob/main/CVEs/CVE-2023-29727/CVE%20detail.mdExploit, Third Party Advisory
Other references
Other vulnerabilities in Call Blocker
- 9.8 Critical severity
- 7.5 High severity
Recent Insecure Storage of Sensitive Information vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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