CVE-2021-1620 — Assignment to Variable without Use in Cisco IOS

CWE-563 — Assignment to Variable without UseCWE-772 — Missing Release of Resource after Effective Lifetime6 documents6 sources
Severity
7.7HIGHNVD
EPSS
0.3%
top 43.99%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Cisco IOSCisco IOSCisco IOS XE
Timeline
PublishedSep 23
Latest updateMay 24

Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) support for the AutoReconnect feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to exhaust the free IP addresses from the assigned local pool. This vulnerability occurs because the code does not release the allocated IP address under certain failure conditions. An attacker could exploit this vulnerability by trying to connect to the device with a non-AnyConnect client. A successful …

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 Packages3 packages

▶NVDcisco/ios412 versions+411
▶NVDcisco/ios_xe277 versions+276
▶CVEListV5cisco/cisco_iosn/a

Patches

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

🔴Vulnerability Details

2
GHSA
GHSA-hj64-pmxg-fcx3: A vulnerability in the Internet Key Exchange Version 2 (IKEv2) support for the AutoReconnect feature of Cisco IOS Software and Cisco IOS XE Software c↗2022-05-24
▶
CVEList
Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability↗2021-09-23
▶

💥Exploits & PoCs

2
Exploit-DB
DLINK DAP-1620 A1 v1.01 - Directory Traversal↗2022-05-11
▶
Nuclei
D-Link DAP-1620 - Local File Inclusion
▶

📋Vendor Advisories

1
Cisco
Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability↗2021-09-22
▶
CVE-2021-1620 — Assignment to Variable without Use | cvebase