Strix
26.1K

CVE-2020-3516

MEDIUMCVSS 4.3/10EPSS 1.67%

Last modified

CVE-2020-3516 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. EPSS estimates a 1.67% chance of exploitation in the next 30 days.

Description

A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.

Metrics

CVSS 3.1
4.3/10

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

EPSS Probability
1.67%

73.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe< 16.9.6
CiscoIos Xe>= 16.12.0, < 16.12.2
CiscoIos Xe>= 17.1.0, < 17.1.1
CiscoIos Xe17.2.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3516?
A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.
How severe is CVE-2020-3516?
CVE-2020-3516 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.67% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3516?
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-2020-3516?

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

Scan your code now

Source: NVD / NIST