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Fencer Intel
high 7.5

CVE-2020-12243 json

In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon…

published 6y ago modified 26d ago also BIT-openldap-2020-12243 , EUVD-2020-4558

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).

Patch / fix

  • bitnami openldap 2.4.50
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • openldap Debian 14, Debian 13, Debian 12 2.4.50+dfsg-1

debian advisories DEBIAN-CVE-2020-12243

  • openldap Ubuntu 16.04 LTS 2.4.42+dfsg-2ubuntu3.8
  • openldap Ubuntu 18.04 LTS 2.4.45+dfsg-1ubuntu1.5
  • openldap Ubuntu 20.04 LTS 2.4.49+dfsg-2ubuntu1.2
  • openldap Ubuntu Pro 14.04 LTS 2.4.31-1+nmu2ubuntu8.5+esm2

ubuntu advisories UBUNTU-CVE-2020-12243

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

  • openldap RHEL 7 2.4.44-22.el7
  • openldap-clients RHEL 7 2.4.44-22.el7
  • openldap-servers RHEL 7 2.4.44-22.el7
  • openldap-servers-sql RHEL 7 2.4.44-22.el7

red hat advisories RHSA-2020:4041

  • openldap2 SLES for SAP 15, SLES 15-LTSS, SLE Module for Legacy 15 SP1 +4 more 2.4.46-9.28.2
  • openldap2 SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 2.4.26-0.74.9.1
  • openldap2-client SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 2.4.26-0.74.9.1
  • openldap2-client-openssl1 SLES 11-SECURITY 2.4.26-0.74.9.1
  • openldap2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +4 more 2.4.41-18.24.17.1
  • openldap2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +14 more 2.4.41-18.68.1
  • openldap2-client SLES for SAP 12 SP1, SLES 12 SP1-LTSS 2.4.41-18.24.17.1

suse advisories SUSE-SU-2020:1219-1SUSE-SU-2020:14358-1SUSE-SU-2020:1210-1SUSE-SU-2020:1193-1

  • openldap2 openSUSE Leap 15.1 2.4.46-lp151.10.9.1

opensuse advisories openSUSE-SU-2020:0647-1

  • openldap Alpine 3.10, Alpine 3.9, Alpine 3.8 2.4.48-r1
  • openldap Alpine 3.11 2.4.48-r2
  • openldap Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 2.4.50-r0

alpine advisories ALPINE-CVE-2020-12243

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

Is CVE-2020-12243 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2020-12243 updated cvss 7.5

openldap: denial of service via nested boolean expressions in LDAP search filters

  • Red Hat Enterprise Linux 5 openldap Red Hat Enterprise Linux 6 openldap, compat-openldap, openldap-clients, openldap-servers, openldap-servers-sql
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 compat-openldap
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Application Platform 5 openldap Red Hat JBoss Enterprise Web Server 2 openldap
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Do 1 openshiftdo/odo-init-image-rhel7 1.1.3-2
    fixed: vendor fix RHSA-2021:0949
  • Red Hat Enterprise Linux Client (v. 7) openldap 2.4.44-22.el7, openldap-clients 2.4.44-22.el7 Red Hat Enterprise Linux Client Optional (v. 7) openldap-servers 2.4.44-22.el7, openldap-servers-sql 2.4.44-22.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openldap 2.4.44-22.el7, openldap-clients 2.4.44-22.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openldap-servers 2.4.44-22.el7, openldap-servers-sql 2.4.44-22.el7 Red Hat Enterprise Linux Server (v. 7) openldap 2.4.44-22.el7, openldap-clients 2.4.44-22.el7, openldap-servers 2.4.44-22.el7 Red Hat Enterprise Linux Server Optional (v. 7) openldap-servers-sql 2.4.44-22.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) openldap 2.4.44-22.el7, openldap-clients 2.4.44-22.el7, openldap-servers 2.4.44-22.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) openldap-servers-sql 2.4.44-22.el7
    fixed: vendor fix RHSA-2020:4041
  • Red Hat Enterprise Linux 8 openldap, openldap-clients, openldap-servers Red Hat JBoss Core Services openldap
    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

cisa ICSA-23-348-10 updated cvss 7.5

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-22-116-01 updated cvss 7.5

Hitachi Energy System Data Manager

  • Hitachi Energy All System Data Manager - SDM600 <1.2 FP2 HF10 (Build Nr. 1.2.14002.506)
    affected: mitigation “Implement and continuously revise least privileges principles to minimize permissions and accesses to SDM600 related resources.” hitachiabb-powergrids.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

4.72% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.openldap.org https://bugs.openldap.org/show_bug.cgi?id=9202 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami openldap
<2.4.50
2.4.50

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

Sources

Fencer Intel 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.