The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Link | Tags |
|---|---|
| https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html | mailing list |
| http://openwall.com/lists/oss-security/2017/11/25/3 | mailing list |
| https://bugs.exim.org/show_bug.cgi?id=2201 | issue tracking exploit |
| http://openwall.com/lists/oss-security/2017/11/25/1 | mailing list |
| http://www.securitytracker.com/id/1039873 | vdb entry third party advisory |
| http://openwall.com/lists/oss-security/2017/11/25/2 | mailing list |
| https://www.debian.org/security/2017/dsa-4053 | third party advisory vendor advisory |
| https://www.exploit-db.com/exploits/43184/ | exploit vdb entry third party advisory |
| http://www.openwall.com/lists/oss-security/2021/05/04/7 | mailing list |