CVE-2006-4434
7.5 · HIGHOverview
CVE-2006-4434 is a high-severity vulnerability affecting sendmail sendmail. It was published on August 29, 2006 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
Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long "header line", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying "The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected."
Remediation
Check the references section for vendor advisories and patches from sendmail. Update sendmail 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 |
|---|---|---|---|
| sendmail | sendmail | >= 0, < 8.13.8 | Affected |
References
Frequently Asked Questions
What is CVE-2006-4434?
CVE-2006-4434 is a high-severity vulnerability affecting sendmail sendmail. It was published on August 29, 2006 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2006-4434?
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-2006-4434?
Check the references section for vendor advisories and patches from sendmail. Update sendmail 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-2006-4434?
CyberStrike's AI-powered security agents can automatically detect CVE-2006-4434 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.
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