Vulnerability Monitor

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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.

Published

2020-05-11T14:15:11.917

Last Modified

2024-11-21T05:00:17.210

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	exim	exim	≤ 4.93	Yes
Operating System	fedoraproject	fedora	31	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	19.10	Yes
Operating System	canonical	ubuntu_linux	20.04	Yes

References

http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory ([email protected])
https://bugs.exim.org/show_bug.cgi?id=2571 Third Party Advisory ([email protected])
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86 Patch, Third Party Advisory ([email protected])
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0 Patch, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/ ([email protected])
https://usn.ubuntu.com/4366-1/ Third Party Advisory ([email protected])
https://www.debian.org/security/2020/dsa-4687 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.exim.org/show_bug.cgi?id=2571 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.exim.org/exim.git/commit/57aa14b216432be381b6295c312065b2fd034f86 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/05/msg00017.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6IQQ2SERFUD4WMRSX6XYDNK7Q4GPT7Y/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M7Z5UG6ZIG32V7M4PP3BCC65C27EWK7G/ (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4366-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2020/dsa-4687 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)