ABB RTU500 Series Buffer Overflow in embedded OpenSSL (CVE-2021-3711)

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

include('compat.inc');

if (description)
{
  script_id(501742);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/04");

  script_cve_id("CVE-2021-3711");
  script_xref(name:"ICSA", value:"23-143-02");
  script_xref(name:"DSA", value:"DSA-4963");
  script_xref(name:"GLSA", value:"GLSA-202209-02");
  script_xref(name:"GLSA", value:"GLSA-202210-02");

  script_name(english:"ABB RTU500 Series Buffer Overflow in embedded OpenSSL (CVE-2021-3711)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability exists in the OpenSSL Version 1.0.2 that affects
the RTU500 Series product versions listed below.

RTU500 series CMU Firmware versions
12.0.1 – 12.0.14
12.2.1 – 12.2.11
12.4.1 – 12.4.11
12.6.1 – 12.6.8
12.7.1 – 12.7.5
13.2.1 – 13.2.5
13.3.1 – 13.3.3
13.4.1

In order to decrypt SM2 encrypted data an application is expected to
call the API function EVP_PKEY_decrypt(). Typically an application
will call this function twice. The first time, on entry, the out
parameter can be NULL and, on exit, the outlen parameter is
populated with the buffer size required to hold the decrypted
plaintext. The application can then allocate a sufficiently sized
buffer and call EVP_PKEY_decrypt() again, but this time passing a non-
NULL value for the out parameter. A bug in the implementation of the
SM2 decryption code means that the calculation of the buffer size
required to hold the plaintext returned by the first call to
EVP_PKEY_decrypt() can be smaller than the actual size required by the
second call. This can lead to a buffer overflow when
EVP_PKEY_decrypt() is called by the application a second time with a
buffer that is too small. A malicious attacker who is able present SM2
content for decryption to an application could cause attacker chosen
data to overflow the buffer by up to a maximum of 62 bytes altering
the contents of other data held after the buffer, possibly changing
application behaviour or causing the application to crash. The
location of the buffer is application dependent but is typically heap
allocated. Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k).

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://www.openssl.org/news/secadv/20210824.txt");
  # https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=59f5e75f3bced8fc0e130d72a3f582cf7b480b46
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4e69aead");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-23-143-02");
  # https://publisher.hitachienergy.com/preview?DocumentID=8DBD000153&LanguageCode=en&DocumentPartId=&Action=Launch
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?10034489");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3711");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(120);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:hitachienergy:rtu500_firmware:-");
  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) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/ABB');

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

var vuln_cpes = {
    "cpe:/o:hitachienergy:rtu500_firmware:12.0" :
        {"versionEndIncluding" : "12.0.14", "versionStartIncluding" : "12.0.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:12.2" :
        {"versionEndIncluding" : "12.2.11", "versionStartIncluding" : "12.2.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:12.4" :
        {"versionEndIncluding" : "12.4.11", "versionStartIncluding" : "12.4.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:12.6" :
        {"versionEndIncluding" : "12.6.8", "versionStartIncluding" : "12.6.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:12.7" :
        {"versionEndIncluding" : "12.7.5", "versionStartIncluding" : "12.7.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:13.2" :
        {"versionEndIncluding" : "13.2.5", "versionStartIncluding" : "13.2.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:13.3" :
        {"versionEndIncluding" : "13.3.3", "versionStartIncluding" : "13.3.1", "family" : "AbbRTU500"},
    "cpe:/o:hitachienergy:rtu500_firmware:13.4.1" :
        {"versionEndIncluding" : "13.4.1", "versionStartIncluding" : "13.4.1", "family" : "AbbRTU500"}
};

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