A vulnerability was found in Cisco IOS XE (Router Operating System) (unknown version). It has been classified as problematic. Affected is an unknown code block of the component Encrypted Traffic Analytics. The manipulation as part of a IP Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the Cisco Encrypted Traffic Analytics (ETA) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.

The bug was discovered 03/27/2019. The weakness was disclosed 03/28/2019 as cisco-sa-20190327-eta-dos as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2019-1741 since 12/06/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/17/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316395 (Cisco IOS XE Software Encrypted Traffic Analytics Denial of Service Vulnerability(cisco-sa-20190327-eta-dos)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-132525, VDB-132524 and VDB-132523 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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Type

• Router Operating System

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• Cisco

Name

• IOS XE

License

• commercial

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