CVE-2024-20373 Cisco IOS and Cisco IOS XE SNMP Extended ACL Bypass Vulnerability
Attackers can bypass SNMP access controls on Cisco IOS XE devices configured with unsupported extended ACLs, allowing unauthorized SNMP polling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-20373?
CVE-2024-20373 is a medium-severity vulnerability in Cisco IOS XE Catalyst SD-WAN, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the implementation of the Simple Network Management Protocol (SNMP) IPv4 access control list (ACL) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform SNMP polling of an affected device, even if it is configured to deny SNMP traffic. This vulnerability exists because Cisco IOS Software and Cisco IOS XE Software do not support extended IPv4 ACLs for SNMP, but they do allow administrators to configure extended named IPv4 ACLs that are attached to the SNMP server configuration without a warning message. This can result in no ACL being applied to the SNMP listening process. An attacker could exploit this vulnerability by performing SNMP polling of an affected device. A successful exploit could allow the attacker to perform SNMP operations that should be denied. The attacker has no control of the SNMP ACL configuration and would still need a valid SNMP version 2c (SNMPv2c) community string or SNMP version 3 (SNMPv3) user credentials. SNMP with IPv6 ACL configurations is not affected. For more information, see the section of this advisory.
Weakness: CWE-284
Which versions are affected by CVE-2024-20373?
It affects 1 product.
Products include Cisco Ios Xe Sd-Wan.
How do I fix CVE-2024-20373?
No fix has been published for CVE-2024-20373 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-20373 being exploited?
There is no known exploitation of CVE-2024-20373 in the wild and no public exploit code.
Other vulnerabilities in Cisco IOS XE Catalyst SD-WAN
- CVE-2021-34727 Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability
- CVE-2020-3375 Cisco SD-WAN Solution Software Buffer Overflow Vulnerability
- CVE-2021-1305 Cisco SD-WAN vManage Authorization Bypass Vulnerabilities
- CVE-2023-20035 Cisco IOS XE SD-WAN Software Command Injection Vulnerability
- CVE-2020-3216 Cisco IOS XE SD-WAN Software Authentication Bypass Vulnerability
Sources
Also known as GHSA-3xmf-m2fg-h94r.