Vulnerability 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.
CVSS Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | <= 4.93 |
| Fedoraproject | Fedora | 31 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/05/04/7ExploitMailing ListThird Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=2571Third Party Advisory
- https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86PatchThird Party Advisory
- https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00017.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4366-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4687Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/7ExploitMailing ListThird Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=2571Third Party Advisory
- https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86PatchThird Party Advisory
- https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00017.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2020-12783?
CVE-2020-12783 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.
How severe is CVE-2020-12783?
CVE-2020-12783 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12783?
Check the references section above for vendor advisories and patch information. Affected products include: Exim Exim, Fedoraproject Fedora, Debian Debian Linux, Canonical Ubuntu Linux.