Vulnerability CVE-2020-12783
Published: 2020-05-11

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.

Type:

CWE-125

 (Out-of-bounds Read)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
EXIM -> EXIM 

 References:
https://bugs.exim.org/show_bug.cgi?id=2571
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html
https://www.debian.org/security/2020/dsa-4687
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