VAR-201309-0036
Vulnerability from variot - Updated: 2023-12-18 13:20The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554. ( Device reload ) There are vulnerabilities that are put into a state. Cisco NX-OS software is a data center-level operating system that reflects modular design, resiliency, and maintainability. A BGP code implementation in Cisco NX-OS Software has a security vulnerability that allows unauthenticated remote attackers to overload affected devices. The vulnerability can be triggered if the affected device has a complex regular expression applied to the inbound route, and the vulnerability can be successfully triggered to trigger a Cisco NX-OS Software reboot. Cisco NX-OS is prone to a denial-of-service vulnerability. An attacker can exploit this issue to cause the affected device to reload, denying service to legitimate users. This issue is being tracked by Cisco bug ID CSCuf49554. Cisco NX-OS is a data center-oriented operating system developed by Cisco. The vulnerability stems from an error in the regular expression engine's handling of complex regular expressions
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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