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Fencer Vulns
medium 5.3

CVE-2020-10700 json

A use-after-free flaw was found in the way samba AD DC LDAP servers, handled 'Paged Results' control is combined with the 'ASQ' control.

published 2020-05-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-3131

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

A use-after-free flaw was found in the way samba AD DC LDAP servers, handled 'Paged Results' control is combined with the 'ASQ' control. A malicious user in a samba AD could use this flaw to cause denial of service. This issue affects all samba versions before 4.10.15, before 4.11.8 and before 4.12.2.

Patch / fix

  • samba samba 4.10.15, 4.11.8, 4.12.2
  • samba Debian 14, Debian 13, Debian 12 2:4.12.3+dfsg-2

debian advisories DEBIAN-CVE-2020-10700

  • samba Ubuntu 20.04 LTS 2:4.11.6+dfsg-0ubuntu1.1

ubuntu advisories UBUNTU-CVE-2020-10700

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.10.17+git.203.862547088ca-3.14.1
  • ldb SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.5.8-3.5.1
  • samba SLE Module for Python 2 15 SP2, SLE Module for Basesystem 15 SP2, SLE High Availability Extension 15 SP2 4.11.11+git.180.2cf3b203f07-4.5.1
  • ldb SLE Module for Basesystem 15 SP2 2.0.12-3.3.1

suse advisories SUSE-SU-2020:2673-1SUSE-SU-2020:1948-1

  • ldb openSUSE Tumbleweed 2.3.0-1.3
  • samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1
  • samba openSUSE Leap 15.2 4.11.11+git.180.2cf3b203f07-lp152.3.6.1
  • ldb openSUSE Leap 15.2 2.0.12-lp152.2.6.1
  • samba openSUSE Leap 15.2 4.11.11+git.180.2cf3b203f07-lp152.3.3.1
  • ldb openSUSE Leap 15.2 2.0.12-lp152.2.3.1

opensuse advisories openSUSE-SU-2024:10911-1openSUSE-SU-2024:11365-1openSUSE-SU-2020:1313-1openSUSE-SU-2020:1023-1

  • samba Alpine 3.10 4.10.15-r0
  • samba Alpine 3.11 4.11.8-r0
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 4.12.2-r0

alpine advisories ALPINE-CVE-2020-10700

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-10700 updated cvss 5.3

samba: Use-after-free in Samba AD DC LDAP Server with ASQ

  • Red Hat Enterprise Linux 5 samba, samba3x Red Hat Enterprise Linux 6 samba, samba4, samba4-dc, samba-swat, samba4-libs, samba4-pidl, +17 more Red Hat Enterprise Linux 7 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +18 more Red Hat Enterprise Linux 8 ctdb, samba, libnetapi, ctdb-tests, samba-libs, samba-pidl, +24 more Red Hat Storage 3 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +21 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.03% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:N/I:N/A:P

Affected products

  • Red Hat samba

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.