CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
23.6%
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(502151);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/18");
script_cve_id("CVE-2020-26145");
script_name(english:"Cisco Multiple Products Use of a Broken or Risky Cryptographic Algorithm (CVE-2020-26145)");
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:L/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-26145");
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);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26145
www.nessus.org/u?839210e5
www.nessus.org/u?be0512b5
www.nessus.org/u?c9516038
www.openwall.com/lists/oss-security/2021/05/11/12
github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md
lists.debian.org/debian-lts-announce/2021/06/msg00019.html
lists.debian.org/debian-lts-announce/2021/06/msg00020.html
lists.debian.org/debian-lts-announce/2023/04/msg00002.html
www.fragattacks.com
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
23.6%