CVE-2020-27840

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 5.20% Top 15%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory samba.org
Affected: n/a samba
Published at:
Updated at:

References

Link Tags
https://security.netapp.com/advisory/ntap-20210326-0007/ third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/ vendor advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html third party advisory mailing list
https://www.debian.org/security/2021/dsa-4884 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/ vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1941400 issue tracking third party advisory
https://www.samba.org/samba/security/CVE-2020-27840.html vendor advisory
https://security.gentoo.org/glsa/202105-22 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-27840?
CVE-2020-27840 has been scored as a high severity vulnerability.
How to fix CVE-2020-27840?
To fix CVE-2020-27840, 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-2020-27840 being actively exploited in the wild?
It is possible that CVE-2020-27840 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.
What software or system is affected by CVE-2020-27840?
CVE-2020-27840 affects n/a samba.
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