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nessusThis script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.TENABLE_OT_CISCO_CVE-2020-26139.NASL
HistoryMar 18, 2024 - 12:00 a.m.

Cisco Multiple Products Use of a Broken or Risky Cryptographic Algorithm (CVE-2020-26139)

2024-03-1800:00:00
This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
7
cisco
multiple products
broken cryptographic algorithm
vulnerability
wi-fi
wpa
wpa2
wpa3
wep
ot asset

2.9 Low

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:M/Au:N/C:N/I:N/A:P

5.3 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.6 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

64.8%

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn’t require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

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

include('compat.inc');

if (description)
{
  script_id(502098);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/18");

  script_cve_id("CVE-2020-26139");

  script_name(english:"Cisco Multiple Products Use of a Broken or Risky Cryptographic Algorithm (CVE-2020-26139)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2,
and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all
fragments of a frame are encrypted under the same key. An adversary
can abuse this to decrypt selected fragments when another device sends
fragmented frames and the WEP, CCMP, or GCMP encryption key is
periodically renewed.

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.fragattacks.com");
  script_set_attribute(attribute:"see_also", value:"https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md");
  script_set_attribute(attribute:"see_also", value:"http://www.openwall.com/lists/oss-security/2021/05/11/12");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c9516038");
  # https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?be0512b5");
  # https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?839210e5");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-26139");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(327);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/05/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8861_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8865_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8832_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_6861_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ip_phone_8821_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) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Cisco');

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

var vuln_cpes = {
    "cpe:/o:cisco:ip_phone_6861_firmware" :
        {"versionEndExcluding" : "11.3(5)", "family" : "CiscoIPPhones"},
    "cpe:/o:cisco:ip_phone_8821_firmware" :
        {"versionEndExcluding" : "11.0(6)sr2", "family" : "CiscoIPPhones"},
    "cpe:/o:cisco:ip_phone_8832_firmware" :
        {"versionEndExcluding" : "14.1(1)", "family" : "CiscoIPPhones"},
    "cpe:/o:cisco:ip_phone_8861_firmware" :
        {"versionEndExcluding" : "14.1(1)", "family" : "CiscoIPPhones"},
    "cpe:/o:cisco:ip_phone_8865_firmware" :
        {"versionEndExcluding" : "14.1(1)", "family" : "CiscoIPPhones"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_NOTE);
VendorProductVersionCPE
ciscoip_phone_8861_firmwarecpe:/o:cisco:ip_phone_8861_firmware
ciscoip_phone_8865_firmwarecpe:/o:cisco:ip_phone_8865_firmware
ciscoip_phone_8832_firmwarecpe:/o:cisco:ip_phone_8832_firmware
ciscoip_phone_6861_firmwarecpe:/o:cisco:ip_phone_6861_firmware
ciscoip_phone_8821_firmwarecpe:/o:cisco:ip_phone_8821_firmware

2.9 Low

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:M/Au:N/C:N/I:N/A:P

5.3 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.6 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

64.8%