The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows remote attackers to cause a denial of service (rea
The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows remote attackers to cause a denial of service (reachable assertion and application crash) via crafted BER data, as demonstrated by an attack against slapd.
- Published
- Sep 11, 2015
- Updated
- Jun 16, 2026
- EPSS
- 20.0% · 97th percentile
- CWE
- CWE-20
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 20.0%
Affected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple mac os xup to 10.11.1 inclusive
- openldap openldapup to 2.4.42 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | openldap | before 2.4.42+dfsg-2 | 2.4.42+dfsg-2 |
| Debian:6.0 | openldap | before 2.4.23-7.3+deb6u2 | 2.4.23-7.3+deb6u2 |
| Debian:7 | openldap | before 2.4.31-2+deb7u1 | 2.4.31-2+deb7u1 |
| Debian:8 | openldap | before 2.4.40+dfsg-1+deb8u1 | 2.4.40+dfsg-1+deb8u1 |
| openSUSE:Tumbleweed | openldap2 | before 1.2-22.1 | 1.2-22.1 |
| Red Hat:enterprise_linux:5::client | compat-openldap | before 0:2.3.43_2.2.29-29.el5_11 | 0:2.3.43_2.2.29-29.el5_11 |
| Red Hat:enterprise_linux:5::client | openldap | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client | openldap-clients | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client | openldap-debuginfo | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client_workstation | openldap-devel | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client_workstation | openldap-servers | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client_workstation | openldap-servers-overlays | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:5::client_workstation | openldap-servers-sql | before 0:2.3.43-29.el5_11 | 0:2.3.43-29.el5_11 |
| Red Hat:enterprise_linux:6::client | openldap | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:6::client | openldap-clients | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:6::client | openldap-debuginfo | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:6::client | openldap-devel | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:6::client | openldap-servers | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:6::client | openldap-servers-sql | before 0:2.4.40-6.el6_7 | 0:2.4.40-6.el6_7 |
| Red Hat:enterprise_linux:7::client | openldap | before 0:2.4.39-7.el7_1 | 0:2.4.39-7.el7_1 |
| Red Hat:enterprise_linux:7::client | openldap-clients | before 0:2.4.39-7.el7_1 | 0:2.4.39-7.el7_1 |
| Red Hat:enterprise_linux:7::client | openldap-debuginfo | before 0:2.4.39-7.el7_1 | 0:2.4.39-7.el7_1 |
| Red Hat:enterprise_linux:7::client | openldap-devel | before 0:2.4.39-7.el7_1 | 0:2.4.39-7.el7_1 |
| Red Hat:enterprise_linux:7::client | openldap-servers | before 0:2.4.39-7.el7_1 | 0:2.4.39-7.el7_1 |
+13
Same product
openldap: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-29155In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in the experimental back-sql backend to slapd, vi58Plan
- CVE-2020-36228An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, r55Plan
- CVE-2020-36221An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, result55Plan
- CVE-2020-36227A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in de53Plan
- CVE-2020-36222A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation, resulting in denial 53Plan
- CVE-2006-5779OpenLDAP before 2.3.29 allows remote attackers to cause a denial of service (daemon crash) via LDAP BIND requests with long authcid names, w53Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:openldap | 2.4.42+dfsg-2 · Debian:12 | Package registry (OSV) |
| opensuse:openldap2 | 1.2-22.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:compat-openldap | 0:2.3.43_2.2.29-29.el5_11 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openldap | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openldap-clients | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openldap-debuginfo | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
| red hat:openldap-devel | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
| red hat:openldap-servers | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
| red hat:openldap-servers-overlays | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
| red hat:openldap-servers-sql | 0:2.3.43-29.el5_11 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
| suse:openldap2 | 2.4.26-0.62.2 · SUSE:Linux Enterprise Software Development Kit 11 SP3 | Package registry (OSV) |
| suse:openldap2-client | 2.4.26-0.62.2 · SUSE:Linux Enterprise Software Development Kit 11 SP3 | Package registry (OSV) |
| suse:openldap2-client-openssl1 | 2.4.26-0.62.3 · SUSE:Linux Enterprise Server 11-SECURITY | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2015-09-11 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-1 d
- Published
- TodaySep 30, 2026+4037 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00031.html
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00032.html
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00037.html
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00039.html
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00040.html
- rhn.redhat.com/errata/RHSA-2015-1840.html
- www.debian.org/security/2015/dsa-3356
- www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commit%3Bh=6fe51a9ab04fd28bbc171da3cf12f1c1040d6629
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- www.security-assessment.com/files/documents/advisory/OpenLDAP-ber_get_next-Denial-of-Service.pdf
- www.securityfocus.com/bid/76714
- www.securitytracker.com/id/1033534
- www.ubuntu.com/usn/USN-2742-1
- support.apple.com/HT205637
Vendor advisories and official records. Exploit/PoC links are deliberately left out.