In the Linux kernel, the following vulnerability has been resolved:
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
syzbot managed to call xt_cluster match via ebtables:
WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780
[..]
ebt_do_table+0x174b/0x2a40
Module registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet
processing. As this is only useful to restrict locally terminating
TCP/UDP traffic, register this for ipv4 and ipv6 family only.
Pablo points out that this is a general issue, direct users of the
set/getsockopt interface can call into targets/matches that were only
intended for use with ip(6)tables.
Check all UNSPEC matches and targets for similar issues:
- matches and targets are fine except if they assume skb_network_header()
is valid -- this is only true when called from inet layer: ip(6) stack
pulls the ip/ipv6 header into linear data area.
- targets that return XT_CONTINUE or other xtables verdicts must be
restricted too, they are incompatbile with the ebtables traverser, e.g.
EBT_CONTINUE is a completely different value than XT_CONTINUE.
Most matches/targets are changed to register for NFPROTO_IPV4/IPV6, as
they are provided for use by ip(6)tables.
The MARK target is also used by arptables, so register for NFPROTO_ARP too.
While at it, bail out if connbytes fails to enable the corresponding
conntrack family.
This change passes the selftests in iptables.git.
References
Configurations
Configuration 1 (hide)
|
History
25 Oct 2024, 15:45
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189 - Patch | |
| References | () https://git.kernel.org/stable/c/4cdc55ec6222bb195995cc58f7cb46e4d8907056 - Patch | |
| References | () https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6c - Patch | |
| References | () https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326 - Patch | |
| References | () https://git.kernel.org/stable/c/85ff9a0f793ca52c527e75cd40a69c948627ebde - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo |
21 Oct 2024, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-10-21 20:15
Updated : 2024-10-25 15:45
NVD link : CVE-2024-50038
Mitre link : CVE-2024-50038
JSON object : View
Products Affected
linux
- linux_kernel
CWE