Описание
When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Fast Datapath for RHEL 7 | ovn2.11 | Fix deferred | ||
| Fast Datapath for RHEL 7 | ovn2.12 | Fix deferred | ||
| Fast Datapath for RHEL 7 | ovn2.13 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn2.11 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn2.12 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn2.13 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn22.03 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn22.06 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn22.09 | Fix deferred | ||
| Fast Datapath for RHEL 8 | ovn22.12 | Fix deferred |
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Дополнительная информация
Статус:
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.
When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.
When generating an ICMP Destination Unreachable or Packet Too Big resp ...
When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.
Уязвимость программного многоуровневого коммутатора Open vSwitch, связанная с чтением за допустимыми границами буфера данных, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
6.5 Medium
CVSS3