VDB-205809 · CVE-2021-27798 · GCVE-0-2021-27798

Brocade Fabric OS 7.3.1d/7.4.1b path traversal

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in Brocade Fabric OS 7.3.1d/7.4.1b. Affected is an unknown function. Performing a manipulation results in path traversal. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is cataloged as CVE-2021-27798. The attack must be initiated from a local position. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Brocade Fabric OS 7.3.1d/7.4.1b. It has been classified as critical. This affects some unknown functionality. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

** UNSUPPORTED WHEN ASSIGNED ** A vulnerability in Brocade Fabric OS versions v7.4.1b and v7.3.1d could allow local users to conduct privileged directory transversal. Brocade Fabric OS versions v7.4.1.x and v7.3.x have reached end of life. Brocade Fabric OS Users should upgrade to supported versions as described in the Product End-of-Life Publish report.

The weakness was shared 08/06/2022. The advisory is shared at broadcom.com. This vulnerability is uniquely identified as CVE-2021-27798 since 02/26/2021. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading eliminates this vulnerability.

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

Productinfo

Vendor

Brocade

Name

Fabric OS

Version

License

commercial

Support

end of life

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.5
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: Path traversal
CWE: CWE-22
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

02/26/2021 🔍
08/06/2022 +525 days 🔍
08/06/2022 +0 days 🔍
07/04/2024 +698 days 🔍

Sourcesinfo

Advisory: broadcom.com
Status: Confirmed

CVE: CVE-2021-27798 (🔍)
GCVE (CVE): GCVE-0-2021-27798
GCVE (VulDB): GCVE-100-205809

Entryinfo

Created: 08/06/2022 08:24
Updated: 07/04/2024 07:54
Changes: 08/06/2022 08:24 (39), 09/03/2022 08:27 (11), 07/04/2024 07:54 (16)
Complete: 🔍
Cache ID: 216::103