CVE-2022-2274: OpenSSL RSA RCE Vulnerability on AVX512

CVE-2022-2274 Overview

CVE-2022-2274 is a critical memory corruption vulnerability in OpenSSL 3.0.4 affecting the RSA implementation on X86_64 CPUs that support AVX512IFMA instructions. This bug causes incorrect RSA computations with 2048-bit private keys and results in heap memory corruption during cryptographic operations. The memory corruption can be leveraged by remote attackers to achieve code execution on vulnerable systems, making this a severe threat to SSL/TLS servers and other applications relying on RSA cryptography.

Critical Impact

Remote attackers can trigger memory corruption in SSL/TLS servers using 2048-bit RSA keys on systems with AVX512IFMA-capable processors, potentially leading to arbitrary code execution without authentication.

Affected Products

• OpenSSL 3.0.4
• NetApp SnapCenter
• NetApp H410C, H300S, H500S, H700S, H410S (hardware and firmware)

Discovery Timeline

• 2022-07-01 - CVE-2022-2274 published to NVD
• 2022-07-05 - OpenSSL releases security advisory
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-2274

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-Bounds Write), a memory corruption issue introduced in the OpenSSL 3.0.4 release. The bug specifically affects the RSA implementation's handling of operations on X86_64 processors with AVX512IFMA instruction set extensions. When RSA operations are performed using 2048-bit private keys on affected hardware, the computation produces incorrect results and triggers memory corruption in the heap.

The vulnerability is particularly dangerous because it can be triggered remotely through standard SSL/TLS handshakes or any cryptographic operation involving RSA with 2048-bit keys. The memory corruption occurs during legitimate cryptographic operations, meaning an attacker does not need special privileges or user interaction to exploit the flaw.

Root Cause

The root cause is a programming error introduced in OpenSSL 3.0.4 within the RSA implementation code path that utilizes AVX512IFMA instructions for performance optimization on modern X86_64 processors. The optimization code contains a bug that causes buffer boundaries to be miscalculated during RSA operations with 2048-bit keys, leading to out-of-bounds memory writes. This affects only the specific combination of OpenSSL 3.0.4, 2048-bit RSA keys, and processors supporting AVX512IFMA instructions.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by:

1. Identifying a target server running OpenSSL 3.0.4 on hardware with AVX512IFMA support
2. Initiating SSL/TLS connections that trigger RSA operations with 2048-bit keys
3. Crafting requests that cause the vulnerable code path to execute
4. Leveraging the resulting memory corruption for arbitrary code execution

The vulnerability occurs during normal TLS handshake operations when the server processes cryptographic operations using its 2048-bit RSA private key. The memory corruption happens on the server side, potentially allowing attackers to execute code in the context of the vulnerable service.

Detection Methods for CVE-2022-2274

Indicators of Compromise

• Unexpected crashes or segmentation faults in OpenSSL-based services during TLS handshakes
• Memory corruption errors in application logs related to RSA operations
• Abnormal process behavior in services using OpenSSL 3.0.4 on AVX512IFMA-capable hardware
• Unusual network traffic patterns targeting TLS endpoints with high connection rates

Detection Strategies

• Inventory all systems running OpenSSL 3.0.4 and identify those with AVX512IFMA-capable processors (Intel Ice Lake, Tiger Lake, or newer)
• Monitor for process crashes and memory errors in SSL/TLS services using system monitoring tools
• Implement network intrusion detection rules to identify potential exploitation attempts targeting TLS services
• Use vulnerability scanners to detect OpenSSL 3.0.4 installations across the environment

Monitoring Recommendations

• Enable detailed logging for SSL/TLS services to capture handshake failures and cryptographic errors
• Deploy application performance monitoring to detect abnormal behavior in OpenSSL-dependent services
• Configure alerting for service restarts or crashes in critical TLS-enabled applications
• Implement network traffic analysis to monitor for unusual patterns in TLS connection attempts

How to Mitigate CVE-2022-2274

Immediate Actions Required

• Upgrade OpenSSL to version 3.0.5 or later immediately on all affected systems
• Identify all systems using OpenSSL 3.0.4 with AVX512IFMA-capable processors as highest priority
• Apply vendor-specific patches for NetApp SnapCenter and affected hardware firmware
• Consider temporarily disabling AVX512IFMA instructions as a short-term workaround if patching is delayed

Patch Information

OpenSSL has released version 3.0.5 which addresses this vulnerability. The fix is documented in the OpenSSL Security Advisory published on July 5, 2022. The specific commit addressing this issue is available in the OpenSSL Git repository. NetApp has also published a security advisory with guidance for affected SnapCenter and hardware products.

Workarounds

• Downgrade to OpenSSL 3.0.3 if immediate upgrade to 3.0.5 is not possible
• Use RSA keys with sizes other than 2048 bits (e.g., 4096-bit keys) as a temporary measure
• Disable AVX512IFMA instruction usage at the CPU level if supported by the operating system
• Consider switching to ECDSA certificates temporarily to avoid RSA operations on affected systems

# Check OpenSSL version on affected systems
openssl version -a

# Verify if system has AVX512IFMA capability
grep avx512ifma /proc/cpuinfo

# Upgrade OpenSSL on Debian/Ubuntu systems
sudo apt update && sudo apt install openssl libssl3

# Upgrade OpenSSL on RHEL/CentOS systems
sudo dnf update openssl