Description
Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkim_finish_bodyhash does not validate the relationship between sig->bodyhash.len and b->bh.len; thus, a crafted DKIM-Signature header might lead to a leak of sensitive information from process memory.
References (1)
Core 1
Core References
Third Party Advisory x_refsource_misc
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28025-BHASH.txt
Scores
CVSS v3
7.5
EPSS
0.0180
EPSS Percentile
82.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-125
Status
published
Products (1)
exim/exim
4.00 - 4.94.2
Published
May 06, 2021
Tracked Since
Feb 18, 2026