CVE-2020-15843
Last modified
CVE-2020-15843 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. ActFax Version 7.10 Build 0335 (2020-05-25) is susceptible to a privilege escalation vulnerability due to insecure folder permissions on %PROGRAMFILES%\ActiveFax\Client\, %PROGRAMFILES%\ActiveFax\Install\ and %PROGRAMFILES%\ActiveFax\Terminal\. The folder permissions allow "Full Control" to "Everyone". EPSS estimates a 0.40% chance of exploitation in the next 30 days.
Description
ActFax Version 7.10 Build 0335 (2020-05-25) is susceptible to a privilege escalation vulnerability due to insecure folder permissions on %PROGRAMFILES%\ActiveFax\Client\, %PROGRAMFILES%\ActiveFax\Install\ and %PROGRAMFILES%\ActiveFax\Terminal\. The folder permissions allow "Full Control" to "Everyone". An authenticated local attacker can exploit this to replace the TSClientB.exe binary in the Terminal directory, which is executed on logon for every user. Alternatively, the attacker can replace any of the binaries in the Client or Install directories. The latter requires additional user interaction, for example starting the client.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Actfax | Actfax | 7.10 | Build 0335 |
References
- https://blog.to.com/advisory-actfax-7-10-build-0335-privilege-escalation-cve-2020-15843/Exploit, Third Party Advisory
- https://blog.to.com/advisory-actfax-7-10-build-0335-privilege-escalation-cve-2020-15843/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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