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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2024-50038netfilter: xtables: avoid NFPROTO_UNSPEC where needed

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.115-1DEBIAN-CVE-2024-50038
Debian:13linux6.11.4-1DEBIAN-CVE-2024-50038
Debian:14linux6.11.4-1DEBIAN-CVE-2024-50038
Ubuntu:22.04:LTSlinux5.15.0-127.137UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux6.8.0-56.58USN-7383-1
Ubuntu:24.04:LTSlinux6.8.0-56.58UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-aws5.15.0-1073.79UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-aws6.8.0-1025.27UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-aws6.8.0-1025.27USN-7383-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1027.29~22.04.1USN-7451-1
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1027.29~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure5.15.0-1078.87UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-azure6.8.0-1025.30UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1025.30~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1078.87.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gcp5.15.0-1072.80UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-gcp6.8.0-1026.28USN-7383-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1026.28UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1026.28~22.04.1USN-7383-1
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1026.28~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gke5.15.0-1070.76UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-gke6.8.0-1021.25USN-7383-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1021.25UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1056.63UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1008.10USN-7383-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1008.10UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-57.59~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-ibm5.15.0-1066.69UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-ibm6.8.0-1022.22UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1023.23~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1071.77UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-kvm5.15.0-1070.75UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-127.137UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-56.58.1USN-7383-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-56.58.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-56.58.1~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-56.58.1~22.04.1USN-7383-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1068.69UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1024.27USN-7383-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1024.27UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1024.27~22.04.1USN-7383-1
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1024.27~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1024.27.1USN-7383-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1024.27.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1032.32UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1004.4UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1020.20UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1024.24UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oracle5.15.0-1071.77UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-oracle6.8.0-1022.23USN-7383-1
Ubuntu:24.04:LTSlinux-oracle6.8.0-1022.23UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1022.23~22.04.1USN-7383-1
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1022.23~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-raspi5.15.0-1066.69UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-raspi6.8.0-1028.32UBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-riscv6.8.0-56.58.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-56.58.1~22.04.1UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-50038
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-50038
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1039.43UBUNTU-CVE-2024-50038

Affected products (as reported)

VendorProductVersions
Linux Linux 0269ea4937343536ec7e85649932bc8c9686ea78 – before 85ff9a0f793ca52c527e75cd40a69c948627ebde0269ea4937343536ec7e85649932bc8c9686ea78 – before 8f482bb7e27b37f1f734bb9a8eeb28b23d59d1890269ea4937343536ec7e85649932bc8c9686ea78 – before 997f67d813ce0cf5eb3cdb8f124da68141e91b6c0269ea4937343536ec7e85649932bc8c9686ea78 – before 4cdc55ec6222bb195995cc58f7cb46e4d89070560269ea4937343536ec7e85649932bc8c9686ea78 – before 0bfcb7b71e735560077a42847f69597ec7dcc326
Linux Linux 2.6.30

References