CVE-2020-27840
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Samba
PublishedMay 12, 2021
First seenMay 12, 2021
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- samba samba4.12.13, 4.13.6, 4.14.1 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/
- debian.org/security/2021/dsa-4884
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/
- security.gentoo.org/glsa/202105-22
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| samba samba | 4.0.0 ≤ v < 4.12.13, 4.13.0 ≤ v < 4.13.6, 4.14.0 ≤ v < 4.14.1 | 4.12.13, 4.13.6, 4.14.1 |
| debian debian_linux | 9.0, 10.0 | — |
| fedoraproject fedora | 32, 33, 34 | — |
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