VAR-200412-0202
Vulnerability from variot - Updated: 2025-04-03 22:34Cisco IOS 12.0S, 12.2, and 12.3, with Open Shortest Path First (OSPF) enabled, allows remote attackers to cause a denial of service (device reload) via a malformed OSPF packet. A denial-of-service vulnerability exists in Cisco's Internetwork Operating System (IOS). This vulnerability may allow remote attackers to conduct denial-of-service attacks on an affected device. Cisco IOS is reported prone to a remote denial of service vulnerability. A remote attacker may exploit this condition in multiple routers that reside on the same network segment as the attacker, to trigger a device reset. The attacker may continuously transmit malicious OSPF packets to the target routers in order to effectively deny network services to legitimate hosts. Cisco IOS is the operating system that runs on many Cisco devices. There is a problem in Cisco IOS processing malformed OSPF packets. OSPF is a routing protocol defined by RFC 2328, designed to manage IP routing within an AS. Some CISCO IOSs have a loophole in the processing of OSPF packets, which can lead to system overload. To successfully exploit this vulnerability, an attacker must know several parameters configured on the interface, such as OSPF Area number, Netmask, hello, and dead timers
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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