Vulnerabilities > CVE-2020-28013 - Out-of-bounds Write vulnerability in Exim

CVSS 7.2 - HIGH

Attack vector

LOCAL

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

COMPLETE

Integrity impact

COMPLETE

Availability impact

COMPLETE

local

low complexity

exim

CWE-787

NVD

Published: 2021-05-06

Updated: 2021-05-10

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Exim Exim Exim 4.00 Exim Exim 4.01 Exim Exim 4.02 Exim Exim 4.03 Exim Exim 4.04 Exim Exim 4.05 Exim Exim 4.10 Exim Exim 4.11 Exim Exim 4.12 Exim Exim 4.14 Exim Exim 4.20 Exim Exim 4.21 Exim Exim 4.22 Exim Exim 4.23 Exim Exim 4.24 Exim Exim 4.30 Exim Exim 4.31 Exim Exim 4.32 Exim Exim 4.33 Exim Exim 4.34 Exim Exim 4.40 Exim Exim 4.41 Exim Exim 4.42 Exim Exim 4.43 Exim Exim 4.44 Exim Exim 4.50 Exim Exim 4.51 Exim Exim 4.52 Exim Exim 4.53 Exim Exim 4.54 Exim Exim 4.60 Exim Exim 4.61 Exim Exim 4.62 Exim Exim 4.63 Exim Exim 4.64 Exim Exim 4.65 Exim Exim 4.66 Exim Exim 4.67 Exim Exim 4.68 Exim Exim 4.69 Exim Exim 4.70 Exim Exim 4.71 Exim Exim 4.72 Exim Exim 4.73 Exim Exim 4.74 Exim Exim 4.75 Exim Exim 4.76 Exim Exim 4.77 Exim Exim 4.80 Exim Exim 4.80.1 Exim Exim 4.82 Exim Exim 4.82.1 Exim Exim 4.84.2 Exim Exim 4.85 Exim Exim 4.85.1 Exim Exim 4.85.2 Exim Exim 4.86 Exim Exim 4.86.1 Exim Exim 4.86.2 Exim Exim 4.87 Exim Exim 4.87.1 Exim Exim 4.88 Exim Exim 4.89 Exim Exim 4.89.1 Exim Exim 4.90 Exim Exim 4.90.0.22 Exim Exim 4.90.0.27 Exim Exim 4.90.1 Exim Exim 4.91 Exim Exim 4.92 Exim Exim 4.92.1 Exim Exim 4.92.2 Exim Exim 4.93 Exim Exim 4.93.0.4 Exim Exim 4.93.0.4-3.1	115

Common Weakness Enumeration (CWE)

CWE-787 - Out-of-bounds Write

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28013-PFPSN.txt