CVE-2020-12783
published 2020-05-11CVE-2020-12783: 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.
PriorityP348high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
4.47%
90.3th percentile
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.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | exim4 | < exim4 4.93-16 (bookworm) | exim4 4.93-16 (bookworm) |
| exim | exim | <= 4.93 | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
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Ubuntu
Exim vulnerability
vendor_ubuntu·2020-05-19
CVE-2020-12783 Exim vulnerability
Title: Exim vulnerability
Summary: Exim could be made to access sensitive information or bypass
authentication if it received a specially crafted input.
It was discovered that Exim incorrectly handled certain inputs.
An remote attacker could possibly use this issue to access sensitive
information or authentication bypass.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
vendor_redhat·2020-05-05·CVSS 7.5
CVE-2020-12783 [HIGH] CWE-125 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
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.
A flaw was found in exim in versions through 4.93. An out-of-bounds memory read in the SPA authenticator was found that could result in a SPA/NTLM authentication bypass. The highest threat from this vulnerability is to data confidentiality.
Statement: This flaw does not affect Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, or Red Hat Enterprise Linux 8.
Package: exim (Red Hat Enterprise Linux 5) - Out of support scope
Debian
CVE-2020-12783: exim4 - Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could ...
vendor_debian·2020·CVSS 7.5
CVE-2020-12783 [HIGH] CVE-2020-12783: exim4 - Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could ...
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.
Scope: local
bookworm: resolved (fixed in 4.93-16)
bullseye: resolved (fixed in 4.93-16)
forky: resolved (fixed in 4.93-16)
sid: resolved (fixed in 4.93-16)
trixie: resolved (fixed in 4.93-16)
GHSA
GHSA-mqxr-gww5-9jhp: Exim through 4
ghsa_unreviewed·2022-05-24
CVE-2020-12783 [MEDIUM] CWE-125 GHSA-mqxr-gww5-9jhp: Exim through 4
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.
OSV
CVE-2020-12783: Exim through 4
osv·2020-05-11·CVSS 7.5
CVE-2020-12783 [HIGH] CVE-2020-12783: Exim through 4
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.
No detection rules found.
No public exploits indexed.
Greynoiseio
NoiseLetter October 2024
blogs_greynoiseio
NoiseLetter October 2024
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Bugzilla
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [fedora-all]
bugzilla·2020-05-15·CVSS 7.5
CVE-2020-12783 [HIGH] CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [fedora-all]
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and t
Bugzilla
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [epel-all]
bugzilla·2020-05-15·CVSS 7.5
CVE-2020-12783 [HIGH] CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [epel-all]
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
f
Bugzilla
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
bugzilla·2020-05-15·CVSS 7.5
CVE-2020-12783 [HIGH] CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
CVE-2020-12783 exim: out-of-bounds read in the SPA authenticator can lead to SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
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.
Reference:
https://bugs.exim.org/show_bug.cgi?id=2571
Upstream commits:
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0
Discussion:
Created exim tracking bugs for this issue:
Affects: epel-all [bug 1836364]
Affects: fedora-all [bug 1836363]
---
Statement:
This flaw does not affect Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, or Red Hat Enterprise Linux 8.
---
This b
http://www.openwall.com/lists/oss-security/2021/05/04/7https://bugs.exim.org/show_bug.cgi?id=2571https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0https://lists.debian.org/debian-lts-announce/2020/05/msg00017.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/https://usn.ubuntu.com/4366-1/https://www.debian.org/security/2020/dsa-4687http://www.openwall.com/lists/oss-security/2021/05/04/7https://bugs.exim.org/show_bug.cgi?id=2571https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0https://lists.debian.org/debian-lts-announce/2020/05/msg00017.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/https://usn.ubuntu.com/4366-1/https://www.debian.org/security/2020/dsa-4687
2020-05-11
Published