CVE-2020-10700Network attack vector

Remote service crash via LDAP control use-after-free

Published May 4, 2020 · Updated Aug 4, 2024

Use-after-free in the Samba AD DC LDAP server allows remote attackers to crash the service by combining ASQ and Paged Results controls. The ASQ module restarts a nested search through the module stack instead of continuing downward, re-entering paged-results processing and accessing freed request state. Affected releases are 4.10.0 through 4.10.14, 4.11.0 through 4.11.7, and 4.12.0 through 4.12.1; a suitable child-and-grandchild link chain is required.

CVSS severity5.3
Medium
EPSS probability1.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Samba AD DC LDAP server allows remote attackers to crash the service by combining ASQ and Paged Results controls. The ASQ module restarts a nested search through the module stack instead of continuing downward, re-entering paged-results processing and accessing freed request state. Affected releases are 4.10.0 through 4.10.14, 4.11.0 through 4.11.7, and 4.12.0 through 4.12.1; a suitable child-and-grandchild link chain is required.

The record

CVE
CVE-2020-10700
Published
May 4, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Samba
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions before 4.10.15
  2. Affected versionversion=All versions before 4.11.8
  3. Affected versionversion=All versions before 4.12.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Sambaversion=All versions before 4.10.15; version=All versions before 4.11.8; version=All versions before 4.12.2

Published CVSS scores

5.3UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
5.3Samba TeamCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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