MediumPublic exploit

Bleichenbacher Attack on MatrixSSL RSA Cipher Suites

IdentifiersCVE-2016-6883CWE-724

MatrixSSL versions prior to 3.8.3, when configured to use RSA cipher suites, are vulnerable to a Bleichenbacher variant attack. This vulnerability allows an attacker to exploit the implementation of RSA encryption in the SSL/TLS protocol, specifically targeting the handling of PKCS#1 v1.5 padding during decryption. The flaw enables an attacker to perform adaptive chosen-ciphertext attacks to decrypt captured SSL/TLS traffic or recover sensitive information such as session keys.

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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 allows a remote attacker to obtain sensitive information, such as decrypted SSL/TLS session data, by leveraging the Bleichenbacher attack. This can lead to the compromise of confidentiality for communications protected by MatrixSSL using RSA cipher suites.

Mitigation

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

If immediate upgrade is not possible, disable RSA cipher suites in MatrixSSL and use only cipher suites that do not rely on RSA key exchange, such as those based on Diffie-Hellman or ECDHE, to prevent exploitation of this vulnerability.

Remediation

Patch, then assume compromise.

Upgrade MatrixSSL to version 3.8.3 or later, which includes a fix for the Bleichenbacher attack vulnerability in RSA cipher suite handling.

PUBLIC EXPLOITS

Exploits

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

VALID 1 / 1 TOTALView more in app

bleichenbacher_oracle.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository is the Metasploit Framework, a comprehensive and modular exploitation framework widely used for penetration testing, vulnerability research, and red teaming. The structure includes configuration files, Ruby code for the core framework, auxiliary data files (such as exploit templates, payloads, and configuration YAMLs), and documentation. The framework supports a wide range of exploit modules, auxiliary modules (for scanning, information gathering, and credential harvesting), and payloads (for remote code execution, reverse shells, Meterpreter sessions, etc.). Notable fingerprintable endpoints include configuration files for database and credential capture, EICAR test files for AV evasion testing, and YAML files for LDAP and email attack configuration. The framework is weaponized, supporting both network and local attack vectors, and is highly extensible for targeting a broad array of platforms and vulnerabilities.

Disclosed Jun 17, 2009rubyyamlnetworklocal

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

MatrixsslMatrixsslapplication

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

ACTIVITY FEED

Recent activity

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

1 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

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