CVE-2022-27943 is a vulnerability found in the GNU GCC version 11.2 that allows for stack consumption within the function demangle_const, as evidenced by the nm-new demonstration. This vulnerability is classified as having a medium severity level, with a CVSS score of 5.5, indicating that while it is not critical, it still poses a significant risk to affected systems.
The vulnerability has been officially recorded and is categorized under CWE-674, which pertains to improper resource management. The potential for stack consumption can lead to high availability impacts, making it crucial for organizations to address this issue in a timely manner.
Exploitation of this vulnerability would require local access, as the attack vector is classified as local. User interaction is also required for the attack to be successful, which adds a layer of complexity. However, the low attack complexity means that the requirements for exploiting the vulnerability are relatively straightforward.
Organizations using GNU GCC 11.2 should prioritize patching immediately to mitigate risks associated with this vulnerability. The urgency is enhanced due to the high impact on availability, which could disrupt services and operations.
Vulnerability Details
The vulnerability allows stack consumption in the demangle_const function, which is part of the libiberty library in GNU GCC 11.2. The CVSS v3.1 vector for the vulnerability is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating a local attack vector, low complexity, no privileges required, and high availability impact.
The affected systems include GNU GCC version 11.2 and Fedora version 36. The vulnerability was first published on March 26, 2022. Organizations should refer to the official documentation for further information on the vulnerability.
Technical Analysis
The root cause of CVE-2022-27943 lies within the handling of stack memory in the demangle_const function. This improper resource management can lead to excessive stack consumption, which may be exploited by an attacker with local access who can manipulate the stack for malicious purposes.
The attack complexity is rated as low, indicating that an adversary with local access can exploit this vulnerability without significant hurdles. User interaction is required, as the attacker would need to prompt the user to execute specific commands that trigger the vulnerability.
The impacts of exploitation include a high availability impact, as the excessive stack consumption can lead to application crashes or resource exhaustion, severely affecting service uptime.
Risk & Impact Analysis
Risk to organizations includes potential service disruptions due to the high availability impact of the vulnerability. If exploited, this could lead to significant downtime, affecting both internal operations and customer-facing services.
Given the CVSS score of 5.5, organizations should address this vulnerability in their priority patch cycle. The risk of exploitation is heightened due to the requirement for local access and user interaction, which could be leveraged by an insider threat or through social engineering tactics.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include GNU GCC 11.2 and Fedora 36. Organizations should ensure they are running patched versions to avoid exposure to this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching GNU GCC to the latest version to mitigate this vulnerability. If an immediate patch is unavailable, consider implementing configuration hardening measures to limit local access and user interactions that could exploit the vulnerability.
For further guidance, organizations can refer to our penetration testing services that can help identify vulnerabilities before they are exploited.
Detection Guidance
Security teams should monitor logs for any unusual stack consumption patterns or service interruptions that could indicate exploitation attempts. Behavioral anomalies in user sessions that trigger demangle_const should also be logged for further analysis.
AppSecure Threat Intelligence Insight
CVE-2022-27943 highlights the ongoing need for organizations to maintain rigorous patch management practices. While currently not actively exploited, the potential for local attacks necessitates vigilance and preparedness.
Organizations should regularly assess their security posture through proactive measures, including conducting regular application security assessments and implementing comprehensive security training for developers.
To stay ahead of vulnerabilities like CVE-2022-27943, organizations should also invest in vulnerability management programs that can adapt to emerging threats and ensure prompt remediation.
Finally, security teams should leverage red teaming services to simulate potential attack scenarios and strengthen defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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