Vulnerability Report

CVE-2006-4434

Title: Sendmail Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2006-4434.

CWE Category CWE-416
Published Date Aug 29, 2006
Modified Date Jun 16, 2026
Exploit Status Not Found
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
4.46%

Vulnerability Summary

CVE-2006-4434: 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."

Impacted Vendors

E
eric_allman 1
M
metainfo 1
S
sendmail 1
R
redhat 1

Reference Links

http://secunia.com/advisories/21637 http://secunia.com/advisories/21641 http://secunia.com/advisories/21696 http://secunia.com/advisories/21700 http://secunia.com/advisories/21749 http://secunia.com/advisories/22369 http://securitytracker.com/id?1016753 http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1 http://www.attrition.org/pipermail/vim/2006-August/000999.html http://www.debian.org/security/2006/dsa-1164 http://www.mandriva.com/security/advisories?name=MDKSA-2006:156 http://www.novell.com/linux/security/advisories/2006_21_sr.html http://www.openbsd.org/errata.html#sendmail3 http://www.openbsd.org/errata38.html#sendmail3 http://www.osvdb.org/28193 http://www.securityfocus.com/bid/19714 http://www.sendmail.org/releases/8.13.8.html http://www.vupen.com/english/advisories/2006/3393 http://www.vupen.com/english/advisories/2006/3994 http://secunia.com/advisories/21637 http://secunia.com/advisories/21641 http://secunia.com/advisories/21696 http://secunia.com/advisories/21700 http://secunia.com/advisories/21749 http://secunia.com/advisories/22369 http://securitytracker.com/id?1016753 http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1 http://www.attrition.org/pipermail/vim/2006-August/000999.html http://www.debian.org/security/2006/dsa-1164 http://www.mandriva.com/security/advisories?name=MDKSA-2006:156 http://www.novell.com/linux/security/advisories/2006_21_sr.html http://www.openbsd.org/errata.html#sendmail3 http://www.openbsd.org/errata38.html#sendmail3 http://www.osvdb.org/28193 http://www.securityfocus.com/bid/19714 http://www.sendmail.org/releases/8.13.8.html http://www.vupen.com/english/advisories/2006/3393 http://www.vupen.com/english/advisories/2006/3994
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2006-4434 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.