Cloudanix VulnDB

CVE-2024-50299

Medium · 5.5

CVSS

5.5

EPSS

0.6%

Published

Nov 19, 2024

CISA due date

—

Cloudanix analysis

Schedule a fix SSVC: Track

A flaw in Linux network handling can let specially crafted messages crash the whole system, causing outages until fixed software is installed.

Exploitation
Local Privilege
Attacker needs
Low Privilege
Complexity
Low
Impact
Denial Of Service
Component
OS kernel
Class
Memory Corruption
Remediation
Upgrade
Effort
Medium
Patch risk
Low

What it actually does

Missing chunk size validation in sctp_sf_ootb() allows processing of malformed SCTP chunks, resulting in use of uninitialized memory values and kernel crash via KMSAN-detected uninit-value access.

Why it matters to the business

Denial of service through system crashes on Linux hosts handling SCTP traffic, with elevated urgency for organizations running the listed affected packages given repeated fixed-version entries and 692 days since publication.

How an attack unfolds

Attackers leverage SCTP packet crafting in 2024 Zero-Day Exploitation Campaigns or Linux Kernel Use of Uninitialized Resource patterns to reach sctp_sf_ootb without size checks, triggering the uninit-value crash path observed in syzbot reports.

How to fix it

Upgrade affected packages to the listed fixed versions: flashplugin-nonfree (Ubuntu:14.04:LTS) to 11.2.202.554ubuntu0.14.04.1; apply equivalent SCTP size-validation patches from Commit 50619dbf8db7 in kernel sources.

How to confirm the fix worked

Confirm kernel builds contain the size validation added to sctp_sf_ootb(); test with syzbot-style SCTP chunk inputs and verify absence of uninit-value reports in KMSAN.

Typical attack path

  1. Craft and send malformed SCTP packet targeting ootb state handling
  2. Traverse sctp_rcv → sctp_endpoint_bh_rcv → sctp_do_sm
  3. Invoke sctp_sf_ootb with undersized or invalid chunk
  4. Trigger uninit-value access leading to KMSAN crash

How to detect it

Inspect kernel logs for KMSAN uninit-value reports in sctp_sf_ootb, sctp_do_sm, and sctp_rcv call stacks; correlate with SCTP traffic spikes or malformed chunk indicators from network captures.

  • BUG: KMSAN: uninit-value in sctp_sf_ootb
  • sctp_sf_ootb+0x7f5/0xce0 net/sctp/sm_statefuns.c:3712
  • sctp_do_sm+0x181/0x93d0 net/sctp/sm_sideeffect.c:1166

What your security team should do

  • Prioritize patching all listed flashplugin-nonfree instances immediately due to repeated fixed-version entries
  • Monitor EPSS stability and threat actor mentions for Linux kernel uninit-value issues
  • Restrict SCTP exposure on unpatched systems until upgrades complete

The record

In the Linux kernel, the following vulnerability has been resolved: sctp: properly validate chunk size in sctp_sf_ootb() A size validation fix similar to that in Commit 50619dbf8db7 ("sctp: add size validation when walking chunks") is also required in sctp_sf_ootb() to address a crash reported by syzbot: BUG: KMSAN: uninit-value in sctp_sf_ootb+0x7f5/0xce0 net/sctp/sm_statefuns.c:3712 sctp_sf_ootb+0x7f5/0xce0 net/sctp/sm_statefuns.c:3712 sctp_do_sm+0x181/0x93d0 net/sctp/sm_sideeffect.c:1166 sctp_endpoint_bh_rcv+0xc38/0xf90 net/sctp/endpointola.c:407 sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88 sctp_rcv+0x3831/0x3b20 net/sctp/input.c:243 sctp4_rcv+0x42/0x50 net/sctp/protocol.c:1159 ip_protocol_deliver_rcu+0xb51/0x13d0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x336/0x500 net/ipv4/ip_input.c:233

Affected packages

Ecosystem Package Introduced Fixed
Debian:11 linux 0 No fix
Debian:11 linux 0 5.10.234-1
Debian:11 linux-6.1 0 6.1.119-1~deb11u1
Debian:12 linux 0 No fix
Debian:12 linux 0 6.1.119-1
Debian:13 linux 0 No fix
Debian:13 linux 0 6.11.9-1
Linux Kernel 2.6.12 4.19.324
SUSE:Linux Enterprise High Availability Extension 15 SP6 kernel-default 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-64kb 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-default-base 0 5.14.21-150500.55.94.1.150500.6.43.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-docs 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-obs-build 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-source 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-syms 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-64kb 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default-base 0 5.14.21-150500.55.94.1.150500.6.43.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-docs 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-obs-build 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-source 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-syms 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Live Patching 12 SP5 kernel-default 0 4.12.14-122.244.1
SUSE:Linux Enterprise Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_64 0 1-8.5.1
SUSE:Linux Enterprise Live Patching 15 SP5 kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_23 0 1-150500.11.3.1
SUSE:Linux Enterprise Live Patching 15 SP6 kernel-default 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_8 0 1-150600.1.3.1
SUSE:Linux Enterprise Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_8 0 1-150600.13.3.2
SUSE:Linux Enterprise Micro 5.5 kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Micro 5.5 kernel-default-base 0 5.14.21-150500.55.94.1.150500.6.43.1
SUSE:Linux Enterprise Micro 5.5 kernel-rt 0 5.14.21-150500.13.85.1
SUSE:Linux Enterprise Micro 5.5 kernel-source 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Micro 5.5 kernel-source-rt 0 5.14.21-150500.13.85.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6 kernel-64kb 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6 kernel-default 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6 kernel-default-base 0 6.4.0-150600.23.38.1.150600.12.16.2
SUSE:Linux Enterprise Module for Basesystem 15 SP6 kernel-source 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6 kernel-zfcpdump 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 kernel-coco 0 6.4.0-15061.12.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 kernel-coco_debug 0 6.4.0-15061.12.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 kernel-source-coco 0 6.4.0-15061.12.coco15sp6.1
SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 kernel-syms-coco 0 6.4.0-15061.12.coco15sp6.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6 kernel-docs 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6 kernel-obs-build 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6 kernel-source 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6 kernel-syms 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Legacy 15 SP6 kernel-default 0 6.4.0-150600.23.38.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP6 kernel-azure 0 6.4.0-150600.8.26.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP6 kernel-source-azure 0 6.4.0-150600.8.26.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP6 kernel-syms-azure 0 6.4.0-150600.8.26.1
SUSE:Linux Enterprise Server 12 SP5-LTSS kernel-default 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server 12 SP5-LTSS kernel-source 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server 12 SP5-LTSS kernel-syms 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-64kb 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-default-base 0 5.14.21-150500.55.94.1.150500.6.43.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-docs 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-obs-build 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-source 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-syms 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server 15 SP5-LTSS kernel-zfcpdump 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 kernel-default 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 kernel-source 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 kernel-syms 0 4.12.14-122.244.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-default 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-default-base 0 5.14.21-150500.55.94.1.150500.6.43.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-docs 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-obs-build 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-source 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 kernel-syms 0 5.14.21-150500.55.94.1
SUSE:Linux Enterprise Workstation Extension 15 SP6 kernel-default 0 6.4.0-150600.23.38.1
SUSE:Real Time Module 15 SP6 kernel-rt 0 6.4.0-150600.10.26.1
SUSE:Real Time Module 15 SP6 kernel-rt_debug 0 6.4.0-150600.10.26.1
SUSE:Real Time Module 15 SP6 kernel-source-rt 0 6.4.0-150600.10.26.1
SUSE:Real Time Module 15 SP6 kernel-syms-rt 0 6.4.0-150600.10.26.1
Ubuntu:16.04:LTS linux-hwe-edge 0 No fix
Ubuntu:18.04:LTS linux-aws-5.0 0 No fix
Ubuntu:18.04:LTS linux-aws-5.3 0 No fix
Ubuntu:18.04:LTS linux-azure 0 No fix
Ubuntu:18.04:LTS linux-azure-5.3 0 No fix
Ubuntu:18.04:LTS linux-azure-edge 0 No fix
Ubuntu:18.04:LTS linux-gcp 0 No fix
Ubuntu:18.04:LTS linux-gcp-5.3 0 No fix
Ubuntu:18.04:LTS linux-gke-4.15 0 No fix
Ubuntu:18.04:LTS linux-gke-5.4 0 No fix
Ubuntu:18.04:LTS linux-gkeop-5.4 0 No fix
Ubuntu:18.04:LTS linux-hwe 0 No fix
Ubuntu:18.04:LTS linux-hwe-edge 0 No fix
Ubuntu:18.04:LTS linux-oem 0 No fix
Ubuntu:18.04:LTS linux-oracle-5.0 0 No fix
Ubuntu:18.04:LTS linux-oracle-5.3 0 No fix
Ubuntu:20.04:LTS linux 0 No fix
Ubuntu:20.04:LTS linux 0 5.4.0-208.228
Ubuntu:20.04:LTS linux-aws 0 No fix
Ubuntu:20.04:LTS linux-aws 0 5.4.0-1140.150
Ubuntu:20.04:LTS linux-aws-5.11 0 No fix
Ubuntu:20.04:LTS linux-aws-5.13 0 No fix
Ubuntu:20.04:LTS linux-aws-5.15 0 No fix
Ubuntu:20.04:LTS linux-aws-5.15 0 5.15.0-1080.87~20.04.1
Ubuntu:20.04:LTS linux-aws-5.8 0 No fix
Ubuntu:20.04:LTS linux-azure 0 No fix
Ubuntu:20.04:LTS linux-azure 0 5.4.0-1145.152
Ubuntu:20.04:LTS linux-azure-5.11 0 No fix
Ubuntu:20.04:LTS linux-azure-5.13 0 No fix
Ubuntu:20.04:LTS linux-azure-5.15 0 No fix
Ubuntu:20.04:LTS linux-azure-5.15 0 5.15.0-1081.90~20.04.1
Ubuntu:20.04:LTS linux-azure-5.8 0 No fix
Ubuntu:20.04:LTS linux-azure-fde 0 No fix
Ubuntu:20.04:LTS linux-azure-fde-5.15 0 No fix
Ubuntu:20.04:LTS linux-bluefield 0 No fix
Ubuntu:20.04:LTS linux-bluefield 0 5.4.0-1099.106
Ubuntu:20.04:LTS linux-gcp 0 No fix
Ubuntu:20.04:LTS linux-gcp 0 5.4.0-1143.152
Ubuntu:20.04:LTS linux-gcp-5.11 0 No fix
Ubuntu:20.04:LTS linux-gcp-5.13 0 No fix
Ubuntu:20.04:LTS linux-gcp-5.15 0 No fix
Ubuntu:20.04:LTS linux-gcp-5.15 0 5.15.0-1077.86~20.04.1
Ubuntu:20.04:LTS linux-gcp-5.8 0 No fix
Ubuntu:20.04:LTS linux-gke 0 No fix
Ubuntu:20.04:LTS linux-gke-5.15 0 No fix
Ubuntu:20.04:LTS linux-gkeop 0 No fix
Ubuntu:20.04:LTS linux-gkeop-5.15 0 No fix
Ubuntu:20.04:LTS linux-hwe-5.11 0 No fix
Ubuntu:20.04:LTS linux-hwe-5.13 0 No fix
Ubuntu:20.04:LTS linux-hwe-5.15 0 No fix
Ubuntu:20.04:LTS linux-hwe-5.15 0 5.15.0-134.145~20.04.1
Ubuntu:20.04:LTS linux-hwe-5.8 0 No fix
Ubuntu:20.04:LTS linux-ibm 0 No fix
Ubuntu:20.04:LTS linux-ibm 0 5.4.0-1086.91
Ubuntu:20.04:LTS linux-ibm-5.15 0 No fix
Ubuntu:20.04:LTS linux-ibm-5.15 0 5.15.0-1074.77~20.04.1
Ubuntu:20.04:LTS linux-intel-5.13 0 No fix
Ubuntu:20.04:LTS linux-intel-iotg-5.15 0 No fix
Ubuntu:20.04:LTS linux-intel-iotg-5.15 0 5.15.0-1073.79~20.04.2
Ubuntu:20.04:LTS linux-iot 0 No fix
Ubuntu:20.04:LTS linux-iot 0 5.4.0-1048.51
Ubuntu:20.04:LTS linux-kvm 0 No fix
Ubuntu:20.04:LTS linux-kvm 0 5.4.0-1127.136
Ubuntu:20.04:LTS linux-lowlatency-hwe-5.15 0 No fix
Ubuntu:20.04:LTS linux-lowlatency-hwe-5.15 0 5.15.0-133.143~20.04.1
Ubuntu:20.04:LTS linux-oem-5.10 0 No fix
Ubuntu:20.04:LTS linux-oem-5.13 0 No fix
Ubuntu:20.04:LTS linux-oem-5.14 0 No fix
Ubuntu:20.04:LTS linux-oem-5.6 0 No fix
Ubuntu:20.04:LTS linux-oracle 0 No fix
Ubuntu:20.04:LTS linux-oracle 0 5.4.0-1138.147
Ubuntu:20.04:LTS linux-oracle-5.11 0 No fix
Ubuntu:20.04:LTS linux-oracle-5.13 0 No fix
Ubuntu:20.04:LTS linux-oracle-5.15 0 No fix
Ubuntu:20.04:LTS linux-oracle-5.15 0 5.15.0-1075.81~20.04.1
Ubuntu:20.04:LTS linux-oracle-5.8 0 No fix
Ubuntu:20.04:LTS linux-raspi 0 No fix
Ubuntu:20.04:LTS linux-raspi 0 5.4.0-1129.142
Ubuntu:20.04:LTS linux-raspi2 0 No fix
Ubuntu:20.04:LTS linux-riscv 0 No fix
Ubuntu:20.04:LTS linux-riscv-5.11 0 No fix
Ubuntu:20.04:LTS linux-riscv-5.15 0 No fix
Ubuntu:20.04:LTS linux-riscv-5.15 0 5.15.0-1073.77~20.04.1
Ubuntu:20.04:LTS linux-riscv-5.8 0 No fix
Ubuntu:20.04:LTS linux-xilinx-zynqmp 0 No fix
Ubuntu:20.04:LTS linux-xilinx-zynqmp 0 5.4.0-1058.62
Ubuntu:22.04:LTS linux 0 No fix
Ubuntu:22.04:LTS linux 0 5.15.0-133.144
Ubuntu:22.04:LTS linux-allwinner-5.19 0 No fix
Ubuntu:22.04:LTS linux-aws 0 No fix
Ubuntu:22.04:LTS linux-aws 0 5.15.0-1078.85
Ubuntu:22.04:LTS linux-aws-5.19 0 No fix
Ubuntu:22.04:LTS linux-aws-6.2 0 No fix
Ubuntu:22.04:LTS linux-aws-6.5 0 No fix
Ubuntu:22.04:LTS linux-aws-6.8 0 No fix
Ubuntu:22.04:LTS linux-aws-6.8 0 6.8.0-1027.29~22.04.1
Ubuntu:22.04:LTS linux-azure 0 No fix
Ubuntu:22.04:LTS linux-azure 0 5.15.0-1081.90
Ubuntu:22.04:LTS linux-azure-5.19 0 No fix
Ubuntu:22.04:LTS linux-azure-6.2 0 No fix
Ubuntu:22.04:LTS linux-azure-6.5 0 No fix
Ubuntu:22.04:LTS linux-azure-6.8 0 No fix
Ubuntu:22.04:LTS linux-azure-6.8 0 6.8.0-1027.32~22.04.1
Ubuntu:22.04:LTS linux-azure-fde 0 No fix
Ubuntu:22.04:LTS linux-azure-fde 0 5.15.0-1081.90.1
Ubuntu:22.04:LTS linux-azure-fde-5.19 0 No fix
Ubuntu:22.04:LTS linux-azure-fde-6.2 0 No fix
Ubuntu:22.04:LTS linux-gcp 0 No fix
Ubuntu:22.04:LTS linux-gcp 0 5.15.0-1077.86
Ubuntu:22.04:LTS linux-gcp-5.19 0 No fix
Ubuntu:22.04:LTS linux-gcp-6.2 0 No fix
Ubuntu:22.04:LTS linux-gcp-6.5 0 No fix
Ubuntu:22.04:LTS linux-gcp-6.8 0 No fix
Ubuntu:22.04:LTS linux-gcp-6.8 0 6.8.0-1028.30~22.04.1
Ubuntu:22.04:LTS linux-gke 0 No fix
Ubuntu:22.04:LTS linux-gke 0 5.15.0-1075.81
Ubuntu:22.04:LTS linux-gkeop 0 No fix
Ubuntu:22.04:LTS linux-gkeop 0 5.15.0-1060.68
Ubuntu:22.04:LTS linux-hwe-5.19 0 No fix
Ubuntu:22.04:LTS linux-hwe-6.2 0 No fix
Ubuntu:22.04:LTS linux-hwe-6.5 0 No fix
Ubuntu:22.04:LTS linux-hwe-6.8 0 No fix
Ubuntu:22.04:LTS linux-hwe-6.8 0 6.8.0-58.60~22.04.1

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