Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | >= 4.0.0, < 4.12.13 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1941400Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00036.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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202105-22Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210326-0007/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4884Third Party Advisory
- https://www.samba.org/samba/security/CVE-2020-27840.htmlVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1941400Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00036.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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202105-22Third Party Advisory
FAQ
What is CVE-2020-27840?
CVE-2020-27840 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 mem...
How severe is CVE-2020-27840?
CVE-2020-27840 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-2020-27840?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Samba, Debian Debian Linux, Fedoraproject Fedora.