Denial of service in Cisco IOS XE Software Web UI



Published: 2020-09-30
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-3516
CWE ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Cisco IOS XE
Operating systems & Components / Operating system

Vendor Cisco Systems, Inc

Security Advisory

This security advisory describes one low risk vulnerability.

1) Input validation error

Risk: Low

CVSSv3: 3.8 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3516

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input during authentication. A remote authenticated attacker can enter unexpected characters during a valid authentication and crash the web server on the device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE: 16.9.2, 16.9.3, 16.9.5, 16.12.1, 17.1.0

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-WEB-UI-exNFmcPO

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.