You are viewing this page in an unauthorized frame window.
This is a potential security issue, you are being redirected to
https://nvd.nist.gov
An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
In the Linux kernel, the following vulnerability has been resolved:
gso: do not skip outer ip header in case of ipip and net_failover
We encounter a tcp drop issue in our cloud environment. Packet GROed in
host forwards to a VM virtio_net nic with net_failover enabled. VM acts
as a IPVS LB with ipip encapsulation. The full path like:
host gro -> vm virtio_net rx -> net_failover rx -> ipvs fullnat
-> ipip encap -> net_failover tx -> virtio_net tx
When net_failover transmits a ipip pkt (gso_type = 0x0103, which means
SKB_GSO_TCPV4, SKB_GSO_DODGY and SKB_GSO_IPXIP4), there is no gso
did because it supports TSO and GSO_IPXIP4. But network_header points to
inner ip header.
Call Trace:
tcp4_gso_segment ------> return NULL
inet_gso_segment ------> inner iph, network_header points to
ipip_gso_segment
inet_gso_segment ------> outer iph
skb_mac_gso_segment
Afterwards virtio_net transmits the pkt, only inner ip header is modified.
And the outer one just keeps unchanged. The pkt will be dropped in remote
host.
Call Trace:
inet_gso_segment ------> inner iph, outer iph is skipped
skb_mac_gso_segment
__skb_gso_segment
validate_xmit_skb
validate_xmit_skb_list
sch_direct_xmit
__qdisc_run
__dev_queue_xmit ------> virtio_net
dev_hard_start_xmit
__dev_queue_xmit ------> net_failover
ip_finish_output2
ip_output
iptunnel_xmit
ip_tunnel_xmit
ipip_tunnel_xmit ------> ipip
dev_hard_start_xmit
__dev_queue_xmit
ip_finish_output2
ip_output
ip_forward
ip_rcv
__netif_receive_skb_one_core
netif_receive_skb_internal
napi_gro_receive
receive_buf
virtnet_poll
net_rx_action
The root cause of this issue is specific with the rare combination of
SKB_GSO_DODGY and a tunnel device that adds an SKB_GSO_ tunnel option.
SKB_GSO_DODGY is set from external virtio_net. We need to reset network
header when callbacks.gso_segment() returns NULL.
This patch also includes ipv6_gso_segment(), considering SIT, etc.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
By selecting these links, you will be leaving NIST webspace.
We have provided these links to other web sites because they
may have information that would be of interest to you. No
inferences should be drawn on account of other sites being
referenced, or not, from this page. There may be other web
sites that are more appropriate for your purpose. NIST does
not necessarily endorse the views expressed, or concur with
the facts presented on these sites. Further, NIST does not
endorse any commercial products that may be mentioned on
these sites. Please address comments about this page to nvd@nist.gov.
Title: kernel de Linux
Description: En el kernel de Linux, se resolvió la siguiente vulnerabilidad: gso: no omita el encabezado de IP externo en caso de ipip y net_failover. Nos encontramos con un problema de caída de TCP en nuestro entorno de nube. El paquete GROed en el host se reenvía a una NIC virtio_net de VM con net_failover habilitado. VM actúa como IPVS LB con encapsulación ipip. La ruta completa como: host gro -> vm virtio_net rx -> net_failover rx -> ipvs fullnat -> ipip en
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 from (excluding) 5.16.12
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.15.26
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 from (excluding) 5.10.103
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 from (excluding) 5.4.182
*cpe:2.3:o:linux:linux_kernel:*:*
In the Linux kernel, the following vulnerability has been resolved:
gso: do not skip outer ip header in case of ipip and net_failover
We encounter a tcp drop issue in our cloud environment. Packet GROed in
host forwards to a VM virtio_net nic with net_failover enabled. VM acts
as a IPVS LB with ipip encapsulation. The full path like:
host gro -> vm virtio_net rx -> net_failover rx -> ipvs fullnat
-> ipip encap -> net_failover tx -> virtio_net tx
When net_failover transmits a ipip pkt (gso_ty
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.13 up to (excluding) 4.9.304
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.269
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.232
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.182
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions fro
Added
CVSS V3.1
NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added
CWE
NIST NVD-CWE-noinfo
Changed
Reference Type
https://git.kernel.org/stable/c/2b3cdd70ea5f5a694f95ea1788393fb3b83071ea No Types Assigned
In the Linux kernel, the following vulnerability has been resolved:
gso: do not skip outer ip header in case of ipip and net_failover
We encounter a tcp drop issue in our cloud environment. Packet GROed in
host forwards to a VM virtio_net nic with net_failover enabled. VM acts
as a IPVS LB with ipip encapsulation. The full path like:
host gro -> vm virtio_net rx -> net_failover rx -> ipvs fullnat
-> ipip encap -> net_failover tx -> virtio_net tx
When net_failover transmits a ipip pkt (gso_ty
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
