Unrated severityNVD Advisory· Published May 2, 2005· Updated Jun 16, 2026
CVE-2005-0021
CVE-2005-0021
Description
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.
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Affected products
4Patches
Vulnerability mechanics
References
10- www.kb.cert.org/vuls/id/132992nvdPatchUS Government Resource
- www.redhat.com/support/errata/RHSA-2005-025.htmlnvdPatch
- www.idefense.com/application/poi/displaynvdExploitVendor Advisory
- security.gentoo.org/glsa/glsa-200501-23.xmlnvdVendor Advisory
- www.debian.org/security/2005/dsa-635nvdVendor Advisory
- www.debian.org/security/2005/dsa-637nvdVendor Advisory
- www.idefense.com/application/poi/displaynvdVendor Advisory
- ftp6.us.freebsd.org/pub/mail/exim/ChangeLogs/ChangeLog-4.44nvd
- www.exim.org/mail-archives/exim-users/Week-of-Mon-20050103/msg00028.htmlnvd
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10347nvd
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