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Vulnerabilities

Vulnerability · CVE-2009-1386

ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec pack…

Published Jun 4, 2009 · catalog updated Jun 16, 2026 · the affected product

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2009-1386 is not in CISA KEV. FIRST estimates a 80.13% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
80.13%
Remediation
Version ranges on file
Affected products
cpe canonical/ubuntu linux · cpe openssl/openssl · cpe redhat/openssl

ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe canonical/ubuntu linux6.06
  • cpe canonical/ubuntu linux8.04
  • cpe openssl/openssl> 0.9.8, < 0.9.8i
  • cpe redhat/openssl0.9.6-15
  • cpe redhat/openssl0.9.6b-3
  • cpe redhat/openssl0.9.7a-2

How to fix CVE-2009-1386

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2009-1386 is not in CISA KEV. FIRST estimates a 80.13% chance of exploitation in the next 30 days. Check whether you run the affected product.

Which versions are affected?

Compare what you have installed with canonical/ubuntu linux 6.06; canonical/ubuntu linux 8.04. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS 80.13%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Technology hubs

OpenSSL security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 4, 2009 · Monitored products — critical

    Detected

    ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

Sources

  • CVE.orgVulnerability recordCVE-2009-1386

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2009-1386

    ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

    nvd.nist.gov
  • Metasploit ModulesPublic exploit moduleauxiliary_dos/ssl/dtls_changecipherspec

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesNov 7, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 4, 2026