Vulnerability Details : CVE-2021-27276

This vulnerability allows remote attackers to delete arbitrary files on affected installations of NETGEAR ProSAFE Network Management System 1.6.0.26. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the MibController class. When parsing the realName parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12122.

Vulnerability category: Directory traversalDenial of service

Published 2021-03-29 21:15:13

Updated 2021-03-30 18:50:28

Source Zero Day Initiative

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-27276

Probability of exploitation activity in the next 30 days: 1.66%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 86 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-27276

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
5.5	MEDIUM	AV:N/AC:L/Au:S/C:N/I:P/A:P	8.0	4.9	nvd@nist.gov
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: Partial
7.1	HIGH	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	2.8	4.2	zdi-disclosures@trendmicro.com
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: High
7.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	2.8	4.2	nvd@nist.gov
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: High

CWE ids for CVE-2021-27276

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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.

Assigned by: zdi-disclosures@trendmicro.com (Primary)

References for CVE-2021-27276

https://kb.netgear.com/000062722/Security-Advisory-for-Denial-of-Service-on-NMS300-PSV-2020-0500

Security Advisory for Denial of Service on NMS300, PSV-2020-0500 | Answer | NETGEAR Support
Vendor Advisory

CVEs referencing this url
https://www.zerodayinitiative.com/advisories/ZDI-21-359/

ZDI-21-359 | Zero Day Initiative
Third Party Advisory;VDB Entry

Products affected by CVE-2021-27276

Netgear » Prosafe Network Management System » Version: 1.6.0.26
cpe:2.3:a:netgear:prosafe_network_management_system:1.6.0.26:*:*:*:*:*:*:*
Matching versions