libseccomp up to 2.3.x Syscall Argument access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in libseccomp up to 2.3.x. The impacted element is an unknown function of the component Syscall Handler. The manipulation as part of Argument results in access control. This vulnerability is cataloged as CVE-2019-9893. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in libseccomp up to 2.3.x. Affected is an unknown functionality of the component Syscall Handler. The manipulation as part of a Argument leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

libseccomp before 2.4.0 did not correctly generate 64-bit syscall argument comparisons using the arithmetic operators (LT, GT, LE, GE), which might able to lead to bypassing seccomp filters and potential privilege escalations.

The bug was discovered 01/31/2019. The weakness was shared 03/21/2019 (Website). The advisory is shared for download at security.gentoo.org. This vulnerability is traded as CVE-2019-9893 since 03/20/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 49 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197479 (Ubuntu Security Notification for Libseccomp Vulnerability (USN-4001-1)).

Upgrading to version 2.4.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libseccomp 2.4.0

Timelineinfo

01/31/2019 🔍
03/20/2019 +48 days 🔍
03/21/2019 +1 days 🔍
03/22/2019 +1 days 🔍
08/04/2023 +1596 days 🔍

Sourcesinfo

Advisory: RHSA-2019:3624
Status: Not defined

CVE: CVE-2019-9893 (🔍)
GCVE (CVE): GCVE-0-2019-9893
GCVE (VulDB): GCVE-100-132084

Entryinfo

Created: 03/22/2019 12:07
Updated: 08/04/2023 12:38
Changes: 03/22/2019 12:07 (58), 05/19/2020 09:26 (2), 08/04/2023 12:38 (4)
Complete: 🔍
Cache ID: 216::103

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