CVE-2021-1623 — Uncontrolled Resource Consumption in Cisco IOS XE

CWE-399CWE-400 — Uncontrolled Resource ConsumptionCWE-476 — NULL Pointer Dereference5 documents5 sources
Severity
7.7HIGHNVD
EPSS
0.3%
top 42.95%
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 Simple Network Management Protocol (SNMP) punt handling function of Cisco cBR-8 Converged Broadband Routers could allow an authenticated, remote attacker to overload a device punt path, resulting in a denial of service (DoS) condition. This vulnerability is due to the punt path being overwhelmed by large quantities of SNMP requests. An attacker could exploit this vulnerability by sending a large number of SNMP requests to an affected device. A successful exploit could allo…

CVSS vector

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

Affected Packages2 packages

▶NVDcisco/ios_xe< 17.6.1a

🔴Vulnerability Details

2
GHSA
GHSA-x762-73p7-hfjc: A vulnerability in the Simple Network Management Protocol (SNMP) punt handling function of Cisco cBR-8 Converged Broadband Routers could allow an auth↗2022-05-24
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CVEList
Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Simple Network Management Protocol Denial of Service Vulnerability↗2021-09-23
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📋Vendor Advisories

2
Red Hat
kernel: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()↗2024-05-24
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Cisco
Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Simple Network Management Protocol Denial of Service Vulnerability↗2021-09-22
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CVE-2021-1623 — Uncontrolled Resource Consumption | cvebase