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CVE-2020-28024

Good to know:

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Date: May 6, 2021

Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.

Language: C

Severity Score

Related Resources (6)

https://security-tracker.debian.org/tracker/CVE-2020-28024
https://nvd.nist.gov/vuln/detail/CVE-2020-28024
https://security.alpinelinux.org/vuln/CVE-2020-28024
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-28024
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28024-UNGET.txt
https://www.mend.io/vulnerability-database/CVE-2020-28024

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

Top Fix

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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): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

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

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