Description
Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c.
References (9)
Core 9
Core References
Third Party Advisory x_refsource_confirm
https://bugs.exim.org/show_bug.cgi?id=2571
Patch, Third Party Advisory x_refsource_confirm
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
Patch, Third Party Advisory x_refsource_confirm
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4687
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4366-1/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/
Exploit, Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2021/05/04/7
Scores
CVSS v3
7.5
EPSS
0.0319
EPSS Percentile
87.1%
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 (11)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
canonical/ubuntu_linux
20.04
debian/debian_linux
8.0
debian/debian_linux
9.0
debian/debian_linux
10.0
exim/exim
< 4.93
fedoraproject/fedora
31
... and 1 more
Published
May 11, 2020
Tracked Since
Feb 18, 2026