PoC Index

CVE-2020-15843

HIGH 7.3EPSS 0.4%

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.

CVSS v3.1
7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0
4.4 MEDIUMAV:L/AC:M/Au:N/C:P/I:P/A:P
EPSS
0.40% chance of exploitation in the next 30 days, 33th percentile
Published
2020-09-24
Updated
2024-08-04

Proof-of-concept exploits (1)

References

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