CVE-2006-4434

HIGH
7.5
CVSS Score
Published: August 29, 2006 at 12:00 AM UTC
Updated: June 16, 2026 at 10:29 PM UTC
1 product affected across 1 vendorSendmail

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

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."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.13.8
Affected range stops below 8.13.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (19)

Third Party Advisoryx_refsource_SECUNIABroken LinkPatchVendor Advisory
http://secunia.com/advisories/21637
Third Party Advisoryx_refsource_SECUNIABroken LinkPatchVendor Advisory
http://secunia.com/advisories/21641
Third Party Advisoryx_refsource_SECUNIABroken LinkVendor Advisory
http://secunia.com/advisories/21696
Third Party Advisoryx_refsource_SECUNIABroken LinkVendor Advisory
http://secunia.com/advisories/21700
Third Party Advisoryx_refsource_SECUNIABroken LinkVendor Advisory
http://secunia.com/advisories/21749
Third Party Advisoryx_refsource_SECUNIABroken LinkVendor Advisory
http://secunia.com/advisories/22369
VDB Entryx_refsource_SECTRACKBroken LinkPatchThird Party Advisory
http://securitytracker.com/id?1016753

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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