cbcvebase.
CVE-2024-50038
published 2024-10-21

CVE-2024-50038: In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: avoid NFPROTO_UNSPEC where needed syzbot managed to call xt_cluster…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.1th percentile
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.

Affected

27 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
debianlinux-6.1< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
linuxlinux
linuxlinux>= 0269ea4937343536ec7e85649932bc8c9686ea78 < 85ff9a0f793ca52c527e75cd40a69c948627ebde85ff9a0f793ca52c527e75cd40a69c948627ebde
linuxlinux>= 0269ea4937343536ec7e85649932bc8c9686ea78 < 8f482bb7e27b37f1f734bb9a8eeb28b23d59d1898f482bb7e27b37f1f734bb9a8eeb28b23d59d189
linuxlinux>= 0269ea4937343536ec7e85649932bc8c9686ea78 < 997f67d813ce0cf5eb3cdb8f124da68141e91b6c997f67d813ce0cf5eb3cdb8f124da68141e91b6c
linuxlinux>= 0269ea4937343536ec7e85649932bc8c9686ea78 < 4cdc55ec6222bb195995cc58f7cb46e4d89070564cdc55ec6222bb195995cc58f7cb46e4d8907056
linuxlinux>= 0269ea4937343536ec7e85649932bc8c9686ea78 < 0bfcb7b71e735560077a42847f69597ec7dcc3260bfcb7b71e735560077a42847f69597ec7dcc326
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.115-16.1.115-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 5.15.0-127.1375.15.0-127.137
linuxlinux_kernel>= 0 < 6.8.0-56.586.8.0-56.58
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 2.6.30 < 5.15.1685.15.168
linuxlinux_kernel>= 5.16 < 6.1.1136.1.113
linuxlinux_kernel>= 6.2 < 6.6.576.6.57
linuxlinux_kernel>= 6.7 < 6.11.46.11.4
msrcazl3_kernel_6.6.56.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.57.1-1_on_azure_linux_3.0
msrcazure_linux_3.0_arm
msrcazure_linux_3.0_x64
msrccbl2_kernel_5.15.167.1-2_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.173.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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