A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.
Published 2021-09-23 03:15:12
Updated 2021-09-30 15:12:35
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-1612

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-1612

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.6
MEDIUM AV:L/AC:L/Au:N/C:N/I:C/A:C
3.9
9.2
NIST
5.5
MEDIUM CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
1.8
3.6
Cisco Systems, Inc.
7.1
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
1.8
5.2
NIST

CWE ids for CVE-2021-1612

  • The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
    Assigned by: nvd@nist.gov (Primary)
  • The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
    Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2021-1612

Products affected by CVE-2021-1612

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