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CVE-2021-34762

HIGHCVSS 8.1/10EPSS 1.91%

Last modified

CVE-2021-34762 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. EPSS estimates a 1.91% chance of exploitation in the next 30 days.

Description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
1.91%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Management Center Virtual Appliance6.2.3
CiscoFirepower Management Center Virtual Appliance6.4.0
CiscoFirepower Management Center Virtual Appliance6.5.0
CiscoFirepower Management Center Virtual Appliance6.6.1
CiscoFirepower Management Center Virtual Appliance6.6.2
CiscoFirepower Management Center Virtual Appliance6.6.3
CiscoFirepower Management Center Virtual Appliance6.6.4
CiscoFirepower Management Center Virtual Appliance6.7.0
CiscoFirepower Management Center Virtual Appliance7.0.0
CiscoFirepower Management Center Virtual Appliance7.1.0
CiscoFirepower Threat Defense< 6.4.0.13
CiscoFirepower Threat Defense>= 6.5.0, < 6.6.5
CiscoFirepower Threat Defense>= 6.7.0, < 6.7.0.3
CiscoFirepower Threat Defense>= 7.0.0, < 7.0.1
CiscoSourcefire Defense Center6.2.3
CiscoSourcefire Defense Center6.4.0
CiscoSourcefire Defense Center6.5.0
CiscoSourcefire Defense Center6.6.1
CiscoSourcefire Defense Center6.6.2
CiscoSourcefire Defense Center6.6.3
CiscoSourcefire Defense Center6.6.4
CiscoSourcefire Defense Center7.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-34762?
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.
How severe is CVE-2021-34762?
CVE-2021-34762 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34762?
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-2021-34762?

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

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Source: NVD / NIST