CVE-2006-4434 Information

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.\

Reference

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.htmlsendmail3 http://www.openbsd.org/errata38.htmlsendmail3 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