High severity · published May 11, 2020
CVE-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
7.5
CVSS
4.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.6% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0; 10.0 · source: NVD
EX
Exim · Exim
through 4.93 · source: NVD
FE
Fedora · Fedoraproject
31; 32 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 19.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12783
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12783
Exploit
http://www.openwall.com/lists/oss-security/2021/05/04/7
Third Party Advisory
https://bugs.exim.org/show_bug.cgi?id=2571
Patch
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86
Patch
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0
Mailing List
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/
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