CVE-2021-28374
7.5 · HIGHOverview
CVE-2021-28374 is a high-severity vulnerability affecting debian courier-authlib. It was published on March 15, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).
Remediation
Check the references section for vendor advisories and patches from debian. Update courier-authlib to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| debian | courier-authlib | >= 0, < 0.71.1-2 | Affected |
Frequently Asked Questions
What is CVE-2021-28374?
CVE-2021-28374 is a high-severity vulnerability affecting debian courier-authlib. It was published on March 15, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-28374?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-28374?
Check the references section for vendor advisories and patches from debian. Update courier-authlib to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-28374?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-28374 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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