Medium severity · published May 28, 2021
CVE-2021-3514
When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted query, causing a crash
6.5
CVSS
1.2%
EPSS
No
On KEV
Description
When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted query, causing a crash.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
3D
389 Directory Server · Redhat
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3514
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3514
Third Party Advisory
https://github.com/389ds/389-ds-base/issues/4711
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html
More from 389 Directory Server
7.5
CVE-2026-11770
389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check
7.5
CVE-2026-15722
389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsing
7.5
CVE-2026-11788
389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser
7.5
CVE-2026-9064
389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos)
7.5
CVE-2022-1949
An access control bypass vulnerability found in 389-ds-base