Unix UID privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.42

Summaryinfo

A vulnerability labeled as critical has been found in Unix. This affects an unknown part of the component UID Handler. The manipulation results in privileges management. This vulnerability is identified as CVE-1999-0556. There is not any exploit available. Modifying the configuration settings is advised.

Detailsinfo

A vulnerability classified as very critical has been found in Unix (Operating System) (the affected version unknown). Affected is an unknown part of the component UID Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Two or more Unix accounts have the same UID.

The weakness was released 01/01/1999. This vulnerability is traded as CVE-1999-0556. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/18/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

It is possible to mitigate the problem by applying the configuration setting .

The vulnerability is also documented in the databases at X-Force (876) and Vulnerability Center (SBV-1475†). Entries connected to this vulnerability are available at VDB-14347 and VDB-14345. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Config
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/01/1999 🔍
01/01/1999 +0 days 🔍
01/01/1999 +0 days 🔍
07/20/2003 +1661 days 🔍
06/19/2014 +3987 days 🔍
04/18/2026 +4320 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-1999-0556 (🔍)
GCVE (CVE): GCVE-0-1999-0556
GCVE (VulDB): GCVE-100-14346
X-Force: 876
Vulnerability Center: 1475 - Two Unix Accounts with Identical UID, Info

See also: 🔍

Entryinfo

Created: 06/20/2014 00:50
Updated: 04/18/2026 00:20
Changes: 06/20/2014 00:50 (35), 05/10/2019 20:10 (16), 04/18/2026 00:20 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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