Siemens SIMATIC, SCALANCE and RUGGEDCOM Devices Use of Uninitialized Resource (CVE-2024-50033)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(503400);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/12");

  script_cve_id("CVE-2024-50033");
  script_xref(name:"ICSA", value:"25-226-07");

  script_name(english:"Siemens SIMATIC, SCALANCE and RUGGEDCOM Devices Use of Uninitialized Resource (CVE-2024-50033)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"In the Linux kernel, the following vulnerability has been resolved:
slip: make slhc_remember() more robust against malicious packets
syzbot found that slhc_remember() was missing checks against
malicious packets [1].    slhc_remember() only checked the size of the
packet was at least 20,  which is not good enough.    We need to make
sure the packet includes the IPv4 and TCP header  that are supposed to
be carried.    Add iph and th pointers to make the code more readable.
[1]    BUG: KMSAN: uninit-value in slhc_remember+0x2e8/0x7b0
drivers/net/slip/slhc.c:666    slhc_remember+0x2e8/0x7b0
drivers/net/slip/slhc.c:666    ppp_receive_nonmp_frame+0xe45/0x35e0
drivers/net/ppp/ppp_generic.c:2455    ppp_receive_frame
drivers/net/ppp/ppp_generic.c:2372 [inline]
ppp_do_recv+0x65f/0x40d0 drivers/net/ppp/ppp_generic.c:2212
ppp_input+0x7dc/0xe60 drivers/net/ppp/ppp_generic.c:2327
pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379
sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113
__release_sock+0x1da/0x330 net/core/sock.c:3072
release_sock+0x6b/0x250 net/core/sock.c:3626
pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x30f/0x380 net/socket.c:744
____sys_sendmsg+0x903/0xb60 net/socket.c:2602
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656
__sys_sendmmsg+0x3c1/0x960 net/socket.c:2742    __do_sys_sendmmsg
net/socket.c:2771 [inline]    __se_sys_sendmmsg net/socket.c:2768
[inline]    __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768
x64_sys_call+0xb6e/0x3ba0
arch/x86/include/generated/asm/syscalls_64.h:308    do_syscall_x64
arch/x86/entry/common.c:52 [inline]    do_syscall_64+0xcd/0x1e0
arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:    slab_post_alloc_hook mm/slub.c:4091 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186
kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587
__alloc_skb+0x363/0x7b0 net/core/skbuff.c:678    alloc_skb
include/linux/skbuff.h:1322 [inline]    sock_wmalloc+0xfe/0x1a0
net/core/sock.c:2732    pppoe_sendmsg+0x3a7/0xb90
drivers/net/ppp/pppoe.c:867    sock_sendmsg_nosec net/socket.c:729
[inline]    __sock_sendmsg+0x30f/0x380 net/socket.c:744
____sys_sendmsg+0x903/0xb60 net/socket.c:2602
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656
__sys_sendmmsg+0x3c1/0x960 net/socket.c:2742    __do_sys_sendmmsg
net/socket.c:2771 [inline]    __se_sys_sendmmsg net/socket.c:2768
[inline]    __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768
x64_sys_call+0xb6e/0x3ba0
arch/x86/include/generated/asm/syscalls_64.h:308    do_syscall_x64
arch/x86/entry/common.c:52 [inline]    do_syscall_64+0xcd/0x1e0
arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 UID: 0 PID: 5460 Comm: syz.2.33 Not tainted
6.12.0-rc2-syzkaller-00006-g87d6aab2389e #0  Hardware name: Google
Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/html/ssa-265688.html");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/html/ssa-355557.html");
  script_set_attribute(attribute:"see_also", value:"https://support.industry.siemens.com/cs/ww/en/view/109988839/");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/ICSA-25-226-07");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

- All affected products: Update to V3.2 or later version

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To
operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens'
operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage

For more information see the associated Siemens security advisory SSA-355557 in HTML and CSAF.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-50033");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(908);

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/27");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rst2428p_firmware:3.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xc-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xr-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xc-400_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xr-500wg_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xr-500_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xcm-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xrm-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xch-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:scalance_xrh-300_series_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:simatic_s7-1500_tm_mfp");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Siemens");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

var asset = tenable_ot::assets::get(vendor:'Siemens');

var vuln_cpes = {
    "cpe:/o:siemens:simatic_s7-1500_tm_mfp" :
        {"versionEndIncluding" : "1.1", "versionStartIncluding" : "1.1", "family" : "S71500", "orderNumbers": ["6ES7558-1AA00-0AB0"]},
    "cpe:/o:siemens:ruggedcom_rst2428p_firmware:3.2" :
        {"versionEndExcluding" : "3.2", "family" : "RuggedCom", "orderNumbers" : ['6GK6242-6PA00']},
    "cpe:/o:siemens:scalance_xc-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"},
    "cpe:/o:siemens:scalance_xr-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"},
    "cpe:/o:siemens:scalance_xc-400_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX400"},
    "cpe:/o:siemens:scalance_xr-500wg_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX500"},
    "cpe:/o:siemens:scalance_xr-500_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX500"},
    "cpe:/o:siemens:scalance_xcm-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"},
    "cpe:/o:siemens:scalance_xrm-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"},
    "cpe:/o:siemens:scalance_xch-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"},
    "cpe:/o:siemens:scalance_xrh-300_series_firmware" :
        {"versionEndExcluding" : "3.2", "family" : "SCALANCEX300"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);