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CVE-2015-4205

5.7 · MEDIUM

Cisco IOS XR 5.3.1 on ASR 9000 devices allows remote attackers to cause a denial of service (NPU chip reset or line-card reload) by sending crafted IEEE 802.3x flow-control PAUSE frames on the loca…

Published Jun 23, 2015ciscoCWE-399EPSS 0.87%

Overview

CVE-2015-4205 is a medium-severity vulnerability affecting cisco ios_xr. It was published on June 23, 2015 and has a CVSS 2.0 base score of 5.7 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.7, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Cisco IOS XR 5.3.1 on ASR 9000 devices allows remote attackers to cause a denial of service (NPU chip reset or line-card reload) by sending crafted IEEE 802.3x flow-control PAUSE frames on the local network, aka Bug ID CSCut19959.

Remediation

Check the references section for vendor advisories and patches from cisco. Update ios_xr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Reftools.cisco.com/security/center/viewAlert.x?alertId=39455Refwww.securityfocus.com/bid/75352Refwww.securitytracker.com/id/1032691Reftools.cisco.com/security/center/viewAlert.x?alertId=39455Refwww.securityfocus.com/bid/75352Refwww.securitytracker.com/id/1032691

How CyberStrike helps

Frequently asked questions

What is CVE-2015-4205?

CVE-2015-4205 is a medium-severity vulnerability affecting cisco ios_xr. It was published on June 23, 2015 and has a CVSS 2.0 base score of 5.7 (MEDIUM).

How severe is CVE-2015-4205?

This vulnerability has a CVSS 2.0 base score of 5.7, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-4205?

Check the references section for vendor advisories and patches from cisco. Update ios_xr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-4205?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-4205 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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