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CVE-2006-4434 Details

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."

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://secunia.com/advisories/21637	CVE	Broken LinkPatchVendor Advisory
http://secunia.com/advisories/21641	CVE	Broken LinkPatchVendor Advisory
http://secunia.com/advisories/21696	CVE	Broken LinkVendor Advisory
http://secunia.com/advisories/21700	CVE	Broken LinkVendor Advisory
http://secunia.com/advisories/21749	CVE	Broken LinkVendor Advisory
http://secunia.com/advisories/22369	CVE	Broken LinkVendor Advisory
http://securitytracker.com/id?1016753	CVE	Broken LinkPatchThird Party AdvisoryVDB Entry
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1	CVE	Broken Link
http://www.attrition.org/pipermail/vim/2006-August/000999.html	CVE	Mailing List
http://www.debian.org/security/2006/dsa-1164	CVE	Broken Link
http://www.mandriva.com/security/advisories?name=MDKSA-2006:156	CVE	Broken Link
http://www.novell.com/linux/security/advisories/2006_21_sr.html	CVE	Broken Link
http://www.openbsd.org/errata38.html#sendmail3	CVE	Third Party Advisory
http://www.openbsd.org/errata.html#sendmail3	CVE	Release Notes
http://www.osvdb.org/28193	CVE	Broken Link
http://www.securityfocus.com/bid/19714	CVE	Broken LinkPatchThird Party AdvisoryVDB Entry
http://www.sendmail.org/releases/8.13.8.html	CVE	Release Notes
http://www.vupen.com/english/advisories/2006/3393	CVE	Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2006/3994	CVE	Broken LinkVendor Advisory
http://secunia.com/advisories/21637	[email protected]	Broken LinkPatchVendor Advisory
http://secunia.com/advisories/21641	[email protected]	Broken LinkPatchVendor Advisory
http://secunia.com/advisories/21696	[email protected]	Broken LinkVendor Advisory
http://secunia.com/advisories/21700	[email protected]	Broken LinkVendor Advisory
http://secunia.com/advisories/21749	[email protected]	Broken LinkVendor Advisory
http://secunia.com/advisories/22369	[email protected]	Broken LinkVendor Advisory
http://securitytracker.com/id?1016753	[email protected]	Broken LinkPatchThird Party AdvisoryVDB Entry
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1	[email protected]	Broken Link
http://www.attrition.org/pipermail/vim/2006-August/000999.html	[email protected]	Mailing List
http://www.debian.org/security/2006/dsa-1164	[email protected]	Broken Link
http://www.mandriva.com/security/advisories?name=MDKSA-2006:156	[email protected]	Broken Link
http://www.novell.com/linux/security/advisories/2006_21_sr.html	[email protected]	Broken Link
http://www.openbsd.org/errata38.html#sendmail3	[email protected]	Third Party Advisory
http://www.openbsd.org/errata.html#sendmail3	[email protected]	Release Notes
http://www.osvdb.org/28193	[email protected]	Broken Link
http://www.securityfocus.com/bid/19714	[email protected]	Broken LinkPatchThird Party AdvisoryVDB Entry
http://www.sendmail.org/releases/8.13.8.html	[email protected]	Release Notes
http://www.vupen.com/english/advisories/2006/3393	[email protected]	Broken LinkVendor Advisory
http://www.vupen.com/english/advisories/2006/3994	[email protected]	Broken LinkVendor Advisory

see all 38 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
sendmail sendmail	< 8.13.8
CPE cpe:2.3:a:sendmail:sendmail:::::::: Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Apr 16, 2026		[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 15, 2024	Reanalysis	[email protected]
Aug 30, 2006	Initial Analysis	[email protected]