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TI-2006-04282 Aliases CVE-2006-4434GHSA-535c-fwmj-7hhw

Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a…

Priority MEDIUM 40CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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."

Why it matters now

EPSS 0.04548 91st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*before 8.13.8VulnerableSendmail
  • cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* Versions before 8.13.8 Vulnerable ·Sendmail

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-4434
  2. 2026-10-03 Alias added: GHSA-535c-fwmj-7hhw

References

Advisory 8

Other 3

  • TI-2002-01263 Buffer overflow in Sendmail 5.79 to 8.12.7 allows remote attackers to execute arbitrary… CVSS 2.0HIGH 10.0
  • TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0
  • TI-2003-00154 The prescan() function in the address parser (parseaddr.c) in Sendmail before 8.12.9 does… CVSS 2.0HIGH 10.0
  • TI-2006-00053 Signal handler race condition in Sendmail 8.13.x before 8.13.6 allows remote attackers to… CVSS 2.0HIGH 7.6
  • TI-2003-00632 A "potential buffer overflow in ruleset parsing" for Sendmail 8.12.9, when using the… CVSS 2.0HIGH 7.5
  • TI-2002-00879 Buffer overflow in Sendmail before 8.12.5, when configured to use a custom DNS map to… CVSS 2.0HIGH 7.5
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences