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CVE-2017-16944

Good to know:

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Date: November 25, 2017

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.

Language: C

Severity Score

Related Resources (13)

https://security-tracker.debian.org/tracker/CVE-2017-16944
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html
https://bugs.exim.org/show_bug.cgi?id=2201
http://www.securitytracker.com/id/1039873
http://www.openwall.com/lists/oss-security/2021/05/04/7
https://www.exploit-db.com/exploits/43184/
https://nvd.nist.gov/vuln/detail/CVE-2017-16944
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-16944
http://openwall.com/lists/oss-security/2017/11/25/3
http://openwall.com/lists/oss-security/2017/11/25/2
https://www.debian.org/security/2017/dsa-4053
http://openwall.com/lists/oss-security/2017/11/25/1
https://www.mend.io/vulnerability-database/CVE-2017-16944

Severity Score

Weakness Type (CWE)

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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