CVE-2005-0021: n/a vulnerability

CVE-2005-0021: Multiple buffer overflows in Exim before 4.43 may allow attackers to execute arbitrary code via (1) an IPv6...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 20:57 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2005-0021 is an old Exim mail server flaw involving buffer overflows before version 4.43. The reported impact is possible arbitrary code execution. Business urgency depends on whether any legacy Exim instances remain, especially internet-facing mail systems or appliances using embedded Exim. Exposure is most likely on legacy systems running Exim earlier than 4.43. Public mail servers, inherited Linux hosts, and appliances with bundled Exim should be checked. Modern supported distributions are unlikely to remain affected unless pinned to obsolete packages. Prioritize as a legacy exposure cleanup item with potentially high impact. If Exim before 4.43 is found on an exposed mail server, remediate promptly. If no legacy Exim exists, residual business risk is low. Mitigation focus: Inventory all systems and appliances running Exim.; Upgrade Exim to 4.43 or later, or apply vendor backported fixes.; Use Debian, Red Hat, Gentoo, or platform vendor advisories for package-specific remediation..

Prepared: Jun 30, 2026, 01:38 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 6, 2005, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:10347CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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