cve-2020-12063
Vulnerability from cvelistv5
Published
2020-04-24 11:59
Modified
2024-08-04 11:48
Severity ?
Summary
A certain Postfix 2.10.1-7 package could allow an attacker to send an email from an arbitrary-looking sender via a homoglyph attack, as demonstrated by the similarity of \xce\xbf to the 'o' character. This is potentially relevant when the /etc/postfix/sender_login feature is used, because a spoofed outbound message that uses a configured sender address is blocked with a "Sender address rejected: not logged in" error message, but a spoofed outbound message that uses a homoglyph of a configured sender address is not blocked. NOTE: some third parties argue that any missed blocking of spoofed outbound messages - except for exact matches to a sender address in the /etc/postfix/sender_login file - is outside the design goals of Postfix and thus cannot be considered a Postfix vulnerability
References
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2020/04/23/12Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2020/04/23/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/04/23/12Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/04/23/3Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
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