CVE-2021-1622 — Deadlock in Cisco IOS XE

CWE-833 — DeadlockCWE-667 — Improper Locking4 documents4 sources
Severity
8.6HIGHNVD
EPSS
0.3%
top 49.84%
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 Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition. This vulnerability is due to a deadlock condition in the code when processing COPS packets under certain conditions. An attacker could exploit this vulnerability by sending COPS packets with high burst rates to an affected device. A successful ex…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 3.9 | Impact: 4.0

Affected Packages2 packages

▶NVDcisco/ios_xe< 16.12.1z1+1

Patches

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

🔴Vulnerability Details

2
GHSA
GHSA-6767-7pjf-mxgf: A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthent↗2022-05-24
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CVEList
Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service Vulnerability↗2021-09-23
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📋Vendor Advisories

1
Cisco
Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Service Denial of Service Vulnerability↗2021-09-22
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CVE-2021-1622 — Deadlock in Cisco IOS XE | cvebase