VAR-201507-0518
Vulnerability from variot - Updated: 2025-04-13 23:22The packet-reassembly implementation in Cisco IOS XE 3.13S and earlier allows remote attackers to cause a denial of service (CPU consumption or packet loss) via fragmented (1) IPv4 or (2) IPv6 packets that trigger ATTN-3-SYNC_TIMEOUT errors after reassembly failures, aka Bug ID CSCuo37957. Cisco IOS XE is an operating system developed by Cisco Systems for its network devices. This vulnerability is caused by an ATTN-3-SYNC_TIMEOUT error message sent to the console and system logs when the program execution fragment packet reassembly fails. An attacker can exploit this issue to consume CPU resources and cause a denial-of-service condition. This issue is being tracked by Cisco Bug ID CSCuo37957
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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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