CVE-2021-1621 — Uncontrolled Resource Consumption in Cisco IOS XE

CWE-399CWE-400 — Uncontrolled Resource Consumption4 documents4 sources
Severity
7.4HIGHNVD
EPSS
0.1%
top 75.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cisco IOS XECisco IOS XE Software
Timeline
PublishedSep 23
Latest updateMay 24

Description

A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the attacker to cause a qu…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 2.8 | Impact: 4.0

Affected Packages2 packages

▶NVDcisco/ios_xe< 17.3.1

Patches

Patch: tools.cisco.com ↗Patch: tools.cisco.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-7pgq-9248-43gw: A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an inter↗2022-05-24
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CVEList
Cisco IOS XE Software Interface Queue Wedge Denial of Service Vulnerability↗2021-09-23
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📋Vendor Advisories

1
Cisco
Cisco IOS XE Software Interface Queue Wedge Denial of Service Vulnerability↗2021-09-22
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CVE-2021-1621 — Uncontrolled Resource Consumption | cvebase