CVE-2005-0021

Multiple buffer overflows in Exim before 4.43 may allow attackers to execute arbitrary code via (1) an IPv6 address with more than 8 components, as demonstrated using the -be command line option, which triggers an overflow in the host_aton function, or (2) the -bh command line option or dnsdb PTR lookup, which triggers an overflow in the dns_build_reverse function.

• http://ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44
• http://security.gentoo.org/glsa/glsa-200501-23.xmlVendor Advisory
• http://www.debian.org/security/2005/dsa-635Vendor Advisory
• http://www.debian.org/security/2005/dsa-637Vendor Advisory
• http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
• http://www.idefense.com/application/poi/display?id=179&type=vulnerabilitiesVendor Advisory
• http://www.idefense.com/application/poi/display?id=183&type=vulnerabilitiesExploit, Vendor Advisory
• http://www.kb.cert.org/vuls/id/132992Patch, US Government Resource
• http://www.redhat.com/support/errata/RHSA-2005-025.htmlPatch
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347
• http://ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44
• http://security.gentoo.org/glsa/glsa-200501-23.xmlVendor Advisory
• http://www.debian.org/security/2005/dsa-635Vendor Advisory
• http://www.debian.org/security/2005/dsa-637Vendor Advisory
• http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.html
• http://www.idefense.com/application/poi/display?id=179&type=vulnerabilitiesVendor Advisory
• http://www.idefense.com/application/poi/display?id=183&type=vulnerabilitiesExploit, Vendor Advisory
• http://www.kb.cert.org/vuls/id/132992Patch, US Government Resource
• http://www.redhat.com/support/errata/RHSA-2005-025.htmlPatch
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347

Published

May 2, 2005

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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