ActFax 4.32 Client Importer Buffer Overflow
43Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 9.3epss 0.4%
from disclosure to weapon0 days
Published on NVDAug 8
metasploitAug 28
exploitation probability
0.4%top 72% of all CVEs
observed exploitation
nono source reports it
A stack-based buffer overflow vulnerability exists in ActFax Server version 4.32, specifically in the "Import Users from File" functionality of the client interface. The application fails to properly validate the length of tab-delimited fields in .exp files, leading to unsafe usage of strcpy() during CSV parsing. An attacker can exploit this vulnerability by crafting a malicious .exp file and importing it using the default character set "ECMA-94 / Latin 1 (ISO 8859)". Successful exploitation may result in arbitrary code execution, leading to full system compromise. User interaction is required to trigger the vulnerability.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
ActFax · ServerReferences
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/actfax_import_users_bof.rbhttps://web.archive.org/web/20130712072809/http://www.pwnag3.com/2012/08/actfax-local-privilege-escalation.htmlhttps://www.actfax.com/https://www.exploit-db.com/exploits/20915https://www.vulncheck.com/advisories/actfax-client-importer-buffer-overflow