PT-2023-1888 · Cisco · Cisco Ios Xe

Published 2023-03-22 · Updated 2023-03-31 · CVE-2023-20072

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in the fragmentation handling code of tunnel protocol packets could allow an unauthenticated, remote attacker to cause an affected system to reload, resulting in a denial of service (DoS) condition. This issue is due to the improper handling of large fragmented tunnel protocol packets. One example of a tunnel protocol is Generic Routing Encapsulation (GRE). An attacker could exploit this vulnerability by sending crafted fragmented packets to an affected system. A successful exploit could allow the attacker to cause the affected system to reload, resulting in a DoS condition. Note that only traffic directed to the affected system can be used to exploit this vulnerability.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2023-01490

CVE-2023-20072

Affected Products

Cisco Ios Xe

References · 7

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-gre-crash-p6nE5Sq5 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-20072 · Security Note
• https://osv.dev/vulnerability/CVE-2023-20072 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-01490 · Security Note
• https://t.me/true_secator/4210 · Telegram Post
• https://t.me/cibsecurity/60591 · Telegram Post
• https://t.me/cvenotify/47247 · Telegram Post