CriticalPublic exploit

Stack-based buffer overflow in ActFax Server 5.01 RAW protocol

IdentifiersCVE-2013-10064CWE-121· Stack-based Buffer Overflow

CVE-2013-10064 is a stack-based buffer overflow in ActFax Server version 5.01. The flaw is present in the server's RAW protocol interface when processing @F506 fax header fields. User-controlled data from the @F506 field is copied unsafely with strcpy into a stack buffer without proper bounds checking, allowing an attacker to overflow the buffer. A remote, unauthenticated attacker with network access to the service on TCP port 4559 can trigger the condition by sending a specially crafted RAW protocol request containing an oversized or malformed @F506 field. The vulnerability may result in process crash or arbitrary code execution depending on exploitability and target conditions.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow remote arbitrary code execution in the context of the ActFax Server process. At minimum, the flaw can cause a denial of service through process termination or instability due to stack corruption. If reliably exploited, an attacker could gain the ability to run attacker-controlled code on the target system without authentication, potentially enabling full compromise of the fax server host, data access, and follow-on activity.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, restrict network access to the ActFax RAW protocol service on TCP port 4559 to trusted hosts only using firewall rules, ACLs, or network segmentation. Disable the exposed RAW protocol interface if it is not required. Monitor the service for malformed or unusually large @F506 header fields and unexpected crashes. Because exploitation is unauthenticated over the network, removing public or untrusted network exposure is the most important interim mitigation.

Remediation

Patch, then assume compromise.

Upgrade ActFax Server to a version in which the RAW protocol @F506 field handling is corrected and unsafe strcpy-based copying is removed or properly bounded. If a vendor-fixed release is available, apply it. Code-level remediation requires replacing unbounded string copy operations with length-checked handling and enforcing strict validation of fax header field sizes before copying data into stack-allocated buffers.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

actfax_raw_server_bof.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit module (modules/exploits/windows/misc/actfax_raw_server_bof.rb) that exploits a buffer overflow vulnerability (CVE-2013-10064) in the ActFax Server 5.01 RAW server component on Windows XP SP3. The exploit connects to the RAW server over TCP, sends a specially crafted @F506 field containing a payload and buffer overflow data, and achieves remote code execution. The module allows the attacker to supply a custom Metasploit payload, such as a reverse shell. The exploit is operational and targets a specific product/version. The only fingerprintable endpoint is the ActFax RAW server's TCP port, which is typically 5151 but is not hardcoded in the module. The code is written in Ruby and is structured as a standard Metasploit exploit module.

Disclosed Feb 5, 2013rubynetwork

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

ActfaxActfaxapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

5 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

5 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5