CVEvulnerability
CVE-2020-27840
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-05-12
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-125
Description
A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
Affected configurations
• samba samba (>= 4.0.0 < 4.12.13)
• samba samba (>= 4.13.0 < 4.13.6)
• samba samba (>= 4.14.0 < 4.14.1)
• debian debian linux 9.0
• debian debian linux 10.0
• fedoraproject fedora 32
• fedoraproject fedora 33
• fedoraproject fedora 34
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1941400 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202105-22 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210326-0007/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4884 Third Party Advisory
- https://www.samba.org/samba/security/CVE-2020-27840.html Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1941400 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/ lists.fedoraproject.org
- https://security.gentoo.org/glsa/202105-22 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210326-0007/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4884 Third Party Advisory
- https://www.samba.org/samba/security/CVE-2020-27840.html Vendor Advisory