High severity7.5NVD Advisory· Published Aug 29, 2006· Updated Jun 16, 2026
CVE-2006-4434
CVE-2006-4434
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."
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*range: <8.13.8
- (no CPE)range: < 8.13.8
Patches
Vulnerability mechanics
References
19- secunia.com/advisories/21637nvdBroken LinkPatchVendor Advisory
- secunia.com/advisories/21641nvdBroken LinkPatchVendor Advisory
- securitytracker.com/idnvdBroken LinkPatchThird Party AdvisoryVDB Entry
- www.securityfocus.com/bid/19714nvdBroken LinkPatchThird Party AdvisoryVDB Entry
- secunia.com/advisories/21696nvdBroken LinkVendor Advisory
- secunia.com/advisories/21700nvdBroken LinkVendor Advisory
- secunia.com/advisories/21749nvdBroken LinkVendor Advisory
- secunia.com/advisories/22369nvdBroken LinkVendor Advisory
- www.openbsd.org/errata38.htmlnvdThird Party Advisory
- www.vupen.com/english/advisories/2006/3393nvdBroken LinkVendor Advisory
- www.vupen.com/english/advisories/2006/3994nvdBroken LinkVendor Advisory
- sunsolve.sun.com/search/document.donvdBroken Link
- www.attrition.org/pipermail/vim/2006-August/000999.htmlnvdMailing List
- www.debian.org/security/2006/dsa-1164nvdBroken Link
- www.mandriva.com/security/advisoriesnvdBroken Link
- www.novell.com/linux/security/advisories/2006_21_sr.htmlnvdBroken Link
- www.openbsd.org/errata.htmlnvdRelease Notes
- www.osvdb.org/28193nvdBroken Link
- www.sendmail.org/releases/8.13.8.htmlnvdRelease Notes
News mentions
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