MediumPublic exploit

Integer Overflow in Samba read_nttrans_ea_list

IdentifiersCVE-2013-4124CWE-190

An integer overflow exists in the read_nttrans_ea_list function in nttrans.c in the smbd component of Samba versions 3.x before 3.5.22, 3.6.x before 3.6.17, and 4.x before 4.0.8. This vulnerability allows remote attackers to trigger excessive memory allocation by sending a specially crafted packet, leading to a denial of service condition.

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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.

Remote attackers can cause the Samba server to consume excessive memory, resulting in a denial of service. There is no indication of code execution or privilege escalation, but service availability is impacted.

Mitigation

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

Restrict network access to the Samba service to trusted hosts and networks to reduce exposure. Monitor for abnormal memory usage and malformed packets targeting the Samba service.

Remediation

Patch, then assume compromise.

Upgrade Samba to version 3.5.22, 3.6.17, 4.0.8, or later, where the integer overflow in read_nttrans_ea_list has been fixed.

PUBLIC EXPLOITS

Exploits

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

VALID 1 / 2 TOTALView more in app

read_nttrans_ea_list.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit auxiliary module targeting a denial of service (DoS) vulnerability in Samba (CVE-2013-4124). The exploit leverages an integer overflow in the 'read_nttrans_ea_list' function of the Samba server, which can be triggered by sending a specially crafted SMB packet with a malformed Extended Attribute (EA) list. The module requires valid SMB credentials and the 'ea support' option to be enabled on the target share. The exploit is configurable via options for the target share, message length, and number of tries. If successful, the exploit will exhaust memory on the target, potentially crashing the Samba service. The code is written in Ruby and is structured as a standard Metasploit module, making use of the framework's SMB and DCERPC libraries. No hardcoded IPs or URLs are present; the target is specified by the user at runtime.

rubynetwork

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

CanonicalUbuntu Linuxoperating_system

Fedora ProjectFedoraoperating_system

OpensuseOpensuseoperating_system

Red HatEnterprise Linuxoperating_system

SambaSambaapplication

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

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

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 activity