CVE-2023-29405 is a critical vulnerability that affects the Golang 'go' command, specifically when using the cgo feature. This vulnerability allows arbitrary code execution at build time, which can occur when executing 'go get' on a malicious module or any other command that builds untrusted code. The issue arises due to improperly handled linker flags specified via the '#cgo LDFLAGS' directive. In particular, flags containing embedded spaces are mishandled, allowing disallowed flags to bypass LDFLAGS sanitization by being included in the argument of another flag. The vulnerability specifically impacts users of the gccgo compiler.
The CVSS score for this vulnerability is 9.8, classifying it as critical. This high score indicates a significant risk to organizations, as it entails potential impacts on confidentiality, integrity, and availability. The vulnerability can be exploited remotely without any user interaction or privileges required, which significantly increases its risk profile. Organizations using the affected versions of Golang must prioritize immediate patching to mitigate potential risks.
As of now, there is no public exploit confirmed for this vulnerability, nor is it listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation remains, which necessitates a proactive approach to vulnerability management.
Organizations should assess their usage of the Golang 'go' command and implement necessary updates to safeguard their systems against this vulnerability. The urgency of remediation cannot be overstated, especially given the critical nature of the CVSS score and the implications of potential exploitation.
Vulnerability Details
The official description of CVE-2023-29405 states that the vulnerability allows arbitrary code execution at build time due to mishandled linker flags. Specifically, it is triggered by the '#cgo LDFLAGS' directive within the go command when building untrusted code.
This vulnerability has been classified under CWE-74, indicating improper neutralization of special elements in output used by a downstream component. The severity level is critical, as reflected by its CVSS score of 9.8, which indicates high impacts across confidentiality, integrity, and availability.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of linker flags within the Golang build system. Attackers may exploit this flaw by crafting malicious modules that leverage the mishandling of flags, leading to arbitrary code execution. The attack vector is network-based, with low complexity required for exploitation. No privileges are needed, nor is user interaction necessary, allowing this attack to be executed seamlessly.
The impact on confidentiality, integrity, and availability is assessed as high, as the execution of arbitrary code can lead to compromised systems and data breaches. Organizations utilizing affected versions of Golang must be acutely aware of these risks and take urgent action.
Risk & Impact Analysis
Risk to organizations includes potential arbitrary code execution, leading to significant disruptions and breaches of sensitive information. The blast radius is extensive, as this vulnerability affects any systems running vulnerable versions of Golang, increasing the urgency for remediation across all impacted environments. Given its critical CVSS score, organizations should prioritize patching immediately.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Golang include all versions prior to 1.19.10 and from 1.20.0 to 1.20.4. For Fedora, the affected version is 38. Users should update to the latest patched versions to protect against this vulnerability.
Mitigation & Remediation
Organizations should apply the latest patches provided by the Golang team immediately. The patched versions include Go 1.20.5 and Go 1.19.10. If immediate patching is not possible, organizations should consider workarounds such as restricting the execution of untrusted code and enhancing configuration hardening measures.
For further information on effective remediation strategies, organizations can refer to our penetration testing services that can help identify potential vulnerabilities.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor log indicators for unusual compilation activities and unauthorized module installations. Behavioral anomalies during the build process may also indicate attempts to exploit this vulnerability. Network signatures associated with malicious modules can aid in identifying threats as well.
AppSecure Threat Intelligence Insight
CVE-2023-29405 highlights the ongoing need for organizations to maintain rigorous security practices, especially when dealing with third-party modules and libraries. As vulnerabilities like this emerge, they reinforce the importance of having a robust vulnerability management program in place. Security teams should also remain vigilant for patterns that indicate similar vulnerabilities, ensuring that preventive measures are implemented across the development lifecycle.
For those utilizing cloud environments, understanding the risks associated with this vulnerability is crucial. Implementing proactive security measures through cloud security assessments can help identify any potential exposures related to this and other vulnerabilities.
Finally, organizations should consider the long-term implications of vulnerabilities such as CVE-2023-29405. Continuous security testing, including continuous penetration testing, is essential to maintaining a strong security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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