CVE-2020-12783

Public Exploit

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.65% Top 15%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.exim.org/show_bug.cgi?id=2571 third party advisory
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86 third party advisory patch
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0 third party advisory patch
https://www.debian.org/security/2020/dsa-4687 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html third party advisory mailing list
https://usn.ubuntu.com/4366-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/ vendor advisory
http://www.openwall.com/lists/oss-security/2021/05/04/7 mailing list exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-12783?
CVE-2020-12783 has been scored as a high severity vulnerability.
How to fix CVE-2020-12783?
To fix CVE-2020-12783, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12783 being actively exploited in the wild?
It is possible that CVE-2020-12783 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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