VDB-103561 · CVE-2016-4984 · Bug 1346120

openldap-servers TLS Certificate generate-server-cert.sh race condition

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.0	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in openldap-servers and classified as problematic. The impacted element is an unknown function in the library /usr/libexec/openldap/generate-server-cert.sh of the component TLS Certificate Handler. This manipulation causes race condition. This vulnerability is handled as CVE-2016-4984. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability was found in openldap-servers (Directory Service Software) (the affected version unknown). It has been declared as problematic. Affected by this vulnerability is an unknown part in the library /usr/libexec/openldap/generate-server-cert.sh of the component TLS Certificate Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality. The summary by CVE is:

/usr/libexec/openldap/generate-server-cert.sh in openldap-servers sets weak permissions for the TLS certificate, which allows local users to obtain the TLS certificate by leveraging a race condition between the creation of the certificate, and the chmod to protect it.

The bug was discovered 06/13/2016. The weakness was released 07/17/2017 as Bug 1346120 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2016-4984 since 05/24/2016. An attack has to be approached locally. A single authentication is necessary for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 399 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 219696 (Linux Distros Unpatched Vulnerability : CVE-2016-4984), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (219696). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Directory Service Software

Name

openldap-servers

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 219696
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2016-4984

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/24/2016 🔍
06/13/2016 +20 days 🔍
07/17/2017 +399 days 🔍
07/17/2017 +0 days 🔍
07/17/2017 +0 days 🔍
03/04/2025 +2787 days 🔍

Sourcesinfo

Advisory: Bug 1346120
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4984 (🔍)
GCVE (CVE): GCVE-0-2016-4984
GCVE (VulDB): GCVE-100-103561

Entryinfo

Created: 07/17/2017 20:09
Updated: 03/04/2025 18:06
Changes: 07/17/2017 20:09 (58), 10/26/2019 07:00 (2), 03/04/2025 18:06 (18)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.