Read the docs
TI-2021-02442 Aliases CVE-2021-3480GHSA-7c98-4wpw-92jq

NULL pointer dereference in slapi-nis

Priority LOW 36CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 7 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

A flaw was found in slapi-nis in versions before 0.56.7. A NULL pointer dereference during the parsing of the Binding DN could allow an unauthenticated attacker to crash the 389-ds-base directory server. The highest threat from this vulnerability is to system availability.

Why it matters now

EPSS 0.01701 77th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 7 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—slapi-nisslapi-nis 0.56.7—No fix listedCNA
  • slapi-nis Vendor— Affected slapi-nis 0.56.7 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:slapi-nis_project:slapi-nis:*:*:*:*:*:*:*:*before 0.56.7VulnerableSlapi-nis Project
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
  • cpe:2.3:a:slapi-nis_project:slapi-nis:*:*:*:*:*:*:*:* Versions before 0.56.7 Vulnerable ·Slapi-nis Project
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Red Hat 4 advisories

  • RHSA-2021:2032 Released 2021-05-19 · Red Hat rating Important
    slapi-nis security and bug fix update
    • Red Hat Enterprise Linux Client Optional (v. 7) slapi-nis-0.56.5-4.el7_9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) slapi-nis-0.56.5-4.el7_9
    • Red Hat Enterprise Linux Server (v. 7) slapi-nis-0.56.5-4.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) slapi-nis-0.56.5-4.el7_9
  • RHSA-2021:2026 Released 2021-05-19 · Red Hat rating Important
    ipa security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) bind-dyndb-ldap-11.2-3.module+el8.2.0+4921+923e30d5.aarch64::idm:DL1, bind-dyndb-ldap-11.2-3.module+el8.2.0+4921+923e30d5.ppc64le::idm:DL1, bind-dyndb-ldap-11.2-3.module+el8.2.0+4921+923e30d5.s390x::idm:DL1 +47
  • RHSA-2021:2027 Released 2021-05-19 · Red Hat rating Important
    ipa security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) bind-dyndb-ldap-11.1-14.module+el8.1.0+4098+f286395e.aarch64::idm:DL1, bind-dyndb-ldap-11.1-14.module+el8.1.0+4098+f286395e.ppc64le::idm:DL1, bind-dyndb-ldap-11.1-14.module+el8.1.0+4098+f286395e.s390x::idm:DL1 +47
Show 1 more Red Hat advisories
  • RHSA-2021:1983 Released 2021-05-18 · Red Hat rating Important
    idm:DL1 security update
    • Red Hat Enterprise Linux AppStream (v. 8) bind-dyndb-ldap-11.6-2.module+el8.4.0+9328+4ec4e316.aarch64::idm:DL1, bind-dyndb-ldap-11.6-2.module+el8.4.0+9328+4ec4e316.ppc64le::idm:DL1, bind-dyndb-ldap-11.6-2.module+el8.4.0+9328+4ec4e316.s390x::idm:DL1 +47

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1983
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2021:2027
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:2026
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:2032
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:2032
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:2032
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:2032
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3480
  2. 2026-10-03 Alias added: GHSA-7c98-4wpw-92jq

References

Patch 1

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences