CVE-2021-43823 : Security Advisory and Response
Discover the impact and mitigation steps for CVE-2021-43823 affecting Sourcegraph prior to version 3.33.2. Learn how to prevent the exposure of sensitive information to unauthorized actors.
Sourcegraph prior to version 3.33.2 is susceptible to a side-channel attack, potentially revealing sensitive information to unauthorized users. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2021-43823
Sourcegraph code search and navigation engine faced a side-channel attack exposing private source code strings pre-version 3.33.2.
What is CVE-2021-43823?
- Vulnerability in Sourcegraph pre-3.33.2 enables authenticated but unauthorized users to guess private code strings.
- Exploitable features include Saved Searches and Code Monitoring.
The Impact of CVE-2021-43823
- Attack Complexity: Low
- Attack Vector: Network
- Confidentiality Impact: High
- Base Score: 6.5 (Medium Severity)
Technical Details of CVE-2021-43823
Sourcegraph vulnerability specifics are critical to understanding its implications and potential threats.
Vulnerability Description
- Side-channel attack on Sourcegraph versions prior to 3.33.2.
Affected Systems and Versions
- Product: Sourcegraph
- Vendor: Sourcegraph
- Vulnerable Version: < 3.33.2
Exploitation Mechanism
- Authenticated but unauthorized user creation of numerous Saved Searches or Code Monitors.
Mitigation and Prevention
Secure your systems through immediate and long-term protective measures against CVE-2021-43823.
Immediate Steps to Take
- Upgrade Sourcegraph to version 3.33.2 or above.
- Disable Saved Searches and Code Monitors if unable to upgrade.
Long-Term Security Practices
- Regularly update Sourcegraph to the latest secure versions.
- Implement access controls and monitoring mechanisms.
Patching and Updates
- Apply patches promptly to mitigate vulnerabilities effectively.