VAR-200303-0056
Vulnerability from variot - Updated: 2025-04-03 22:26Buffer overflow in Cisco IOS 11.2.x to 12.0.x allows remote attackers to cause a denial of service and possibly execute commands via a large number of OSPF neighbor announcements. Cisco Internetwork Operating System (IOS) is the operating system for the majority of Cisco routers. Open Shortest-Path First (OSPF) is a interior routing protocol. Cisco IOS In 1 For each network interface 255 More than one host neighbor relationship Such as trying to establish OSPF neighbor announcements Service operation by receiving (DoS) A vulnerability that causes a condition exists.Communication between networks connected to the router may become impossible. The overflow occurs when more than 255 OSPF neighbors are announced. This may make it possible to execute malicious instructions on a device running a vulnerable version of the software. Denial of service is also possible. This issue corresponds to Cisco Bug ID CSCdp58462. When the OSPF implementation included in some Cisco IOS versions receives notifications from more than 255 OSPF neighbors on an interface, the IO memory structure will be damaged. FX of Phenoelit research provides a program that exploits this vulnerability to execute malicious code on the router
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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.