Strix
26.1K

CVE-2021-20133

MEDIUMCVSS 6.1/10EPSS 2.08%

Last modified

CVE-2021-20133 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 are affected by an absolute path traversal vulnerability that allows a remote, authenticated attacker to set the "message of the day" banner to any file on the system, allowing them to read all or some of the contents of those files. Such sensitive information as hashed credentials, hardcoded plaintext passwords for other services, configuration files, and private keys can be disclosed in this fashion. EPSS estimates a 2.08% chance of exploitation in the next 30 days.

Description

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 are affected by an absolute path traversal vulnerability that allows a remote, authenticated attacker to set the "message of the day" banner to any file on the system, allowing them to read all or some of the contents of those files. Such sensitive information as hashed credentials, hardcoded plaintext passwords for other services, configuration files, and private keys can be disclosed in this fashion. Improper handling of filenames that identify virtual resources, such as "/dev/urandom" allows an attacker to effect a denial of service attack against the command line interfaces of the Quagga services (zebra and ripd).

Metrics

CVSS 3.1
6.1/10

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

EPSS Probability
2.08%

79.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DlinkDir-2640-Us Firmware<= 1.11b02

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-20133?
Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 are affected by an absolute path traversal vulnerability that allows a remote, authenticated attacker to set the "message of the day" banner to any file on the system, allowing them to read all or some of the contents of those files. Such sensitive information as hashed credentials, hardcoded plaintext passwords for other services, configuration files, and private keys can be disclosed in this fashion. Improper handling of filenames that identify virtual resources, such as "/dev/urandom" allows an attacker to effect a denial of service attack against the command line interfaces of the Quagga services (zebra and ripd).
How severe is CVE-2021-20133?
CVE-2021-20133 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 2.08% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20133?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST