Vulnerability Description
A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. 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=1941402Issue 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-2021-20277.htmlVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1941402Issue 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-2021-20277?
CVE-2021-20277 is a vulnerability with a CVSS score of 7.5 (HIGH). A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the requ...
How severe is CVE-2021-20277?
CVE-2021-20277 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-2021-20277?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Samba, Debian Debian Linux, Fedoraproject Fedora.