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CVE-2020-12783

Published: 11 May 2020

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
exim4
Launchpad, Ubuntu, Debian
bionic
Released (4.90.1-1ubuntu1.5)
eoan
Released (4.92.1-1ubuntu3.1)
focal
Released (4.93-13ubuntu1.1)
trusty
Released (4.82-3ubuntu2.4+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (4.93-16)
xenial
Released (4.86.2-2ubuntu2.6)
Patches:
upstream: https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
upstream: https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N