VDB-241217 · CVE-2023-5369 · GCVE-0-2023-5369

FreeBSD Capsicum copy_file_range system dropped privileges

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6.1	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in FreeBSD. This impacts the function copy_file_range system of the component Capsicum. The manipulation leads to dropped privileges. This vulnerability is uniquely identified as CVE-2023-5369. Local access is required to approach this attack. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeBSD (Operating System) (the affected version is unknown). It has been rated as critical. This issue affects the function copy_file_range system of the component Capsicum. The manipulation with an unknown input leads to a dropped privileges vulnerability. Using CWE to declare the problem leads to CWE-273. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Before correction, the copy_file_range system call checked only for the CAP_READ and CAP_WRITE capabilities on the input and output file descriptors, respectively. Using an offset is logically equivalent to seeking, and the system call must additionally require the CAP_SEEK capability. This incorrect privilege check enabled sandboxed processes with only read or write but no seek capability on a file descriptor to read data from or write data to an arbitrary location within the file corresponding to that file descriptor.

The weakness was disclosed 10/04/2023. The advisory is shared at security.FreeBSD.org. The identification of this vulnerability is CVE-2023-5369 since 10/03/2023. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

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

Productinfo

Type

Operating System

Name

FreeBSD

License

open-source

Website

Product: https://www.freebsd.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: 🔍

Exploitinginfo

Class: Dropped privileges
CWE: CWE-273 / CWE-266
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/03/2023 🔍
10/04/2023 +1 days 🔍
10/04/2023 +0 days 🔍
10/25/2023 +21 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: security.FreeBSD.org
Status: Confirmed

CVE: CVE-2023-5369 (🔍)
GCVE (CVE): GCVE-0-2023-5369
GCVE (VulDB): GCVE-100-241217

Entryinfo

Created: 10/04/2023 08:04
Updated: 10/25/2023 09:52
Changes: 10/04/2023 08:04 (39), 10/25/2023 09:52 (11)
Complete: 🔍
Cache ID: 216::103