CVE-2022-23521 is a critical vulnerability in Git, a widely used distributed revision control system. This vulnerability allows for multiple integer overflows during the parsing of gitattributes, which can be triggered by specially crafted `.gitattributes` files. The potential consequences include arbitrary heap reads and writes, ultimately leading to remote code execution. With a CVSS score of 9.8, this vulnerability presents a significant risk to organizations using affected versions of Git.
The issue arises when a large number of path patterns or attributes are defined in the `.gitattributes` file, which can occur in repositories with extensive commit histories. Git's handling of lines longer than 2KB introduces a failure mode dependent on whether the file is present in the working tree or the index. This complexity makes it crucial for organizations to assess their use of Git and the potential risk posed by this vulnerability.
Published on January 17, 2023, the vulnerability has been patched in versions 2.30.7 and later. Organizations should prioritize patching immediately to prevent exploitation. There are currently no known workarounds for this vulnerability, underscoring the urgency for users to upgrade to secure versions of Git.
Failure to address this vulnerability could result in severe consequences, including unauthorized access and control over systems utilizing vulnerable versions of Git. Organizations must remain vigilant and proactive in their security measures.
Vulnerability Details
The official CVE description states that this vulnerability allows for multiple integer overflows when parsing gitattributes, which can lead to arbitrary heap writes and reads. The CVSS score assigned to this vulnerability is 9.8, indicating a critical severity level. The vulnerability affects Git versions prior to 2.30.7 and from 2.31.0 to 2.31.5, 2.32.0 to 2.32.4, 2.33.0 to 2.33.5, 2.34.0 to 2.34.5, 2.35.0 to 2.35.5, 2.36.0 to 2.36.3, 2.37.0 to 2.37.4, 2.38.0 to 2.38.2, and 2.39.0.
Git has released a patch for this vulnerability, and users are advised to upgrade to secure versions. The publication date of the vulnerability was January 17, 2023, and it is classified under CWE-190.
Technical Analysis
The root cause of CVE-2022-23521 stems from the way Git processes gitattributes. When a `.gitattributes` file contains a large number of patterns or attributes, integer overflows can occur. This situation becomes critical when the system attempts to process these attributes during parsing, leading to potential exploitation. The attack vector is primarily through the network, and the attack complexity is low, as no special privileges or user interactions are required.
Attackers may leverage this vulnerability to gain unauthorized access to systems, as it allows arbitrary heap operations. The impact on confidentiality, integrity, and availability is high, making this a severe threat that organizations must address.
Risk & Impact Analysis
The real-world risk associated with CVE-2022-23521 is amplified by the widespread use of Git in software development and version control. The potential for arbitrary code execution poses a significant threat, as attackers could exploit this vulnerability to manipulate code repositories, insert malicious code, or disrupt development processes.
Organizations should consider the blast radius of this vulnerability, as its exploitation could lead to significant breaches of sensitive data or critical infrastructure. Given the high CVSS score and the lack of known workarounds, the urgency for organizations is critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of Git are affected by CVE-2022-23521: all versions prior to 2.30.7, as well as versions 2.31.0 to 2.31.5, 2.32.0 to 2.32.4, 2.33.0 to 2.33.5, 2.34.0 to 2.34.5, 2.35.0 to 2.35.5, 2.36.0 to 2.36.3, 2.37.0 to 2.37.4, and 2.38.0 to 2.38.2. Users should ensure their installations are updated to at least version 2.30.7 or later.
Mitigation & Remediation
To mitigate the risk presented by CVE-2022-23521, organizations should apply the latest patches from Git. Upgrading to version 2.30.7 or later is essential for protection against this vulnerability. In addition, organizations may consider implementing network controls and monitoring to detect any unauthorized changes to repositories.
For more guidance on effective security practices, organizations can refer to our penetration testing services that can help identify vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for any unusual activities related to Git operations. Key indicators include unexpected changes in repository files or unusual access patterns. Additionally, behavioral anomalies during repository updates may signify attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-23521 highlights the importance of maintaining secure coding practices and regular updates in software development. This vulnerability represents a trend of code execution risks associated with unvalidated inputs in configuration files.
Security teams should learn from this incident and prioritize vulnerability management by regularly assessing their dependencies for known vulnerabilities. For comprehensive security strategies, organizations may consider adopting our vulnerability management program and implementing proactive security measures.
Furthermore, organizations should evaluate their security posture through continuous assessments, including penetration testing methodologies, to ensure they are prepared to handle emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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