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| advisory:2021-02-02-1 [2021/02/02 08:49] – added link to the university lab ynezz | advisory:2021-02-02-1 [2021/02/02 19:44] – [DESCRIPTION] dedeckeh | ||
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| - | ====== Security Advisory 2021-02-02-1 - netifd and odhcp6c routing loop on IPv6 point to point links ====== | + | ====== Security Advisory 2021-02-02-1 - netifd and odhcp6c routing loop on IPv6 point to point links (CVE pending) |
| ===== DESCRIPTION ===== | ===== DESCRIPTION ===== | ||
| - | If a link prefix route points to a point-to-point link it can trigger a routing loop if the destination IPv6 address belongs to the prefix. If such a packet is received and not directed to a local IPv6 address it will be routed to the point-to-point link due to the link prefix route; the upstream ISP router will route the IPv6 packet back due to the assigned prefix route creating a "ping pong" effect. | + | In case a link prefix route points to a point-to-point link it can trigger a routing loop if the destination IPv6 address belongs to the prefix |
| The possible routing loop on point-to-point links (e.g PPP) can happen, when the WAN interface is assigned a globally unique prefix (e.g. 2001: | The possible routing loop on point-to-point links (e.g PPP) can happen, when the WAN interface is assigned a globally unique prefix (e.g. 2001: | ||