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CVE-2020-3308

MEDIUMCVSS 4.9/10EPSS 0.60%

Last modified

CVE-2020-3308 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.

Metrics

CVSS 3.1
4.9/10

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

EPSS Probability
0.60%

44.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense< 6.2.2.1
CiscoSecure Firewall Management Center6.2.2
CiscoSecure Firewall Management Center6.2.3

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3308?
A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.
How severe is CVE-2020-3308?
CVE-2020-3308 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3308?
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-2020-3308?

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

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Source: NVD / NIST