Vulnerability Details : CVE-2020-12783
Potential exploit
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.
Products affected by CVE-2020-12783
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Threat overview for CVE-2020-12783
Top countries where our scanners detected CVE-2020-12783
Top open port discovered on systems with this issue
80
IPs affected by CVE-2020-12783 106,204
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2020-12783!
*Directly or indirectly through your vendors, service providers and 3rd parties.
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attack surface intelligence
from SecurityScorecard.
Exploit prediction scoring system (EPSS) score for CVE-2020-12783
0.26%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-12783
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-12783
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-12783
-
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html
[SECURITY] [DLA 2213-1] exim4 security updateMailing List;Third Party Advisory
-
https://www.debian.org/security/2020/dsa-4687
Debian -- Security Information -- DSA-4687-1 exim4Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/04/7
oss-security - 21Nails: Multiple vulnerabilities in EximExploit;Mailing List;Third Party Advisory
-
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0
git.exim.org Git - exim.git/commitPatch;Third Party Advisory
-
https://usn.ubuntu.com/4366-1/
USN-4366-1: Exim vulnerability | Ubuntu security noticesThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/
[SECURITY] Fedora 31 Update: exim-4.93-8.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/
[SECURITY] Fedora 32 Update: exim-4.93-8.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
git.exim.org Git - exim.git/commitPatch;Third Party Advisory
-
https://bugs.exim.org/show_bug.cgi?id=2571
Bug 2571 – Out-of-bound buffer read leads to Authentication Bypass in Exim SPA authentication methodThird Party Advisory
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