CVE-2009-4565

sendmail: incorrect verification of SSL certificate with NUL in name

Published Jan 4, 2010 CVSS 2.0 · 7.5 High EPSS 2.4% KEV · Not listed
Description
sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-1985-1 New sendmail packages fix SSL certificate verification weakness
EUVD EUVD EUVD-2009-4531 sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 7, 2024, 7:08 AM
Reserved
Jan 4, 2010, 12:00 AM
Status
Modified
Published
Jan 4, 2010, 9:30 PM
Modified
Jun 16, 2026, 11:13 PM
Severity
Low
Public date
Dec 30, 2009, 12:00 AM