Out-of-bounds Write

Affecting exim4 package, versions <4.92-8+deb10u6

Report new vulnerabilities
Do your applications use this vulnerable package? Test your applications

NVD Description

Note: Versions mentioned in the description apply to the upstream exim4 package. See Remediation section below for Debian:10 relevant versions.

Exim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus may allow privilege escalation from any user to root. This occurs because of the interpretation of negative sizes in strncpy.

Remediation

Upgrade Debian:10 exim4 to version 4.92-8+deb10u6 or higher.

References

CVSS Score

7.8
high severity
  • Attack Vector
    Local
  • Attack Complexity
    Low
  • Privileges Required
    Low
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE
CVE-2020-28013
CWE
CWE-787
Snyk ID
SNYK-DEBIAN10-EXIM4-1279404
Disclosed
06 May, 2021
Published
05 May, 2021