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Fencer Vulns
low 3.5

CVE-2020-24588 json

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the…

published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17305

cvss
3.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

Patch / fix

  • Siemens SCALANCE W1748-1 M12 V3.0.0
  • Siemens SCALANCE W1750D (JP) V8.7.1.3
  • Siemens SCALANCE W1750D (ROW) V8.7.1.3
  • Siemens SCALANCE W1750D (USA) V8.7.1.3
  • Siemens SCALANCE W1788-1 M12 V3.0.0
  • Siemens SCALANCE W1788-2 EEC M12 V3.0.0
  • Siemens SCALANCE W1788-2 M12 V3.0.0
  • Siemens SCALANCE W1788-2IA M12 V3.0.0
  • Siemens SCALANCE W721-1 RJ45 V6.6.0
  • Siemens SCALANCE W722-1 RJ45 V6.6.0
  • Siemens SCALANCE W734-1 RJ45 V6.6.0
  • Siemens SCALANCE W734-1 RJ45 (USA) V6.6.0
  • Siemens SCALANCE W738-1 M12 V6.6.0
  • Siemens SCALANCE W748-1 M12 V6.6.0
  • Siemens SCALANCE W748-1 RJ45 V6.6.0
  • Siemens SCALANCE W761-1 RJ45 V6.6.0
  • Siemens SCALANCE W774-1 M12 EEC V6.6.0
  • Siemens SCALANCE W774-1 RJ45 V6.6.0
  • Siemens SCALANCE W774-1 RJ45 (USA) V6.6.0
  • Siemens SCALANCE W778-1 M12 V6.6.0
  • Siemens SCALANCE W778-1 M12 EEC V6.6.0
  • Siemens SCALANCE W778-1 M12 EEC (USA) V6.6.0
  • Siemens SCALANCE W786-1 RJ45 V6.6.0
  • Siemens SCALANCE W786-2 RJ45 V6.6.0
  • Siemens SCALANCE W786-2 SFP V6.6.0
  • Siemens SCALANCE W786-2IA RJ45 V6.6.0
  • Siemens SCALANCE W788-1 M12 V6.6.0
  • Siemens SCALANCE W788-1 RJ45 V6.6.0
  • Siemens SCALANCE W788-2 M12 V6.6.0
  • Siemens SCALANCE W788-2 M12 EEC V6.6.0
  • linux Debian 14, Debian 13, Debian 12 5.10.46-1
  • firmware-nonfree Debian 14, Debian 13, Debian 12 20210818-1

debian advisories DEBIAN-CVE-2020-24588

  • linux Ubuntu 18.04 LTS 4.15.0-151.157
  • linux Ubuntu 20.04 LTS 5.4.0-77.86
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1109.116
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1051.53
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1046.49
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1046.48
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1097.99
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1041.42

ubuntu advisories UBUNTU-CVE-2020-24588

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-348.el8
  • perf RHEL 8 4.18.0-348.el8
  • bpftool RHEL 8 4.18.0-348.el8
  • kernel-core RHEL 8 4.18.0-348.el8
  • kernel-tools RHEL 8 4.18.0-348.el8
  • python3-perf RHEL 8 4.18.0-348.el8
  • kernel-modules RHEL 8 4.18.0-348.el8
  • kernel-zfcpdump RHEL 8 4.18.0-348.el8

red hat advisories RHSA-2021:4356RHSA-2021:4140

  • kernel-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.5.1
  • kernel-syms-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.5.1
  • kernel-rt_debug Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.5.1
  • kernel-source-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.5.1
  • kernel-rt SLE Micro 5.3, Real Time Module 15 SP4, openSUSE Leap Micro 5.3 +1 more 5.14.21-150400.15.11.1
  • kernel-syms-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.11.1
  • kernel-rt_debug Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.11.1
  • kernel-source-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.11.1

suse advisories SUSE-SU-2023:2809-1SUSE-SU-2023:0488-1SUSE-SU-2023:0433-1SUSE-SU-2023:0394-1SUSE-SU-2021:2451-1SUSE-SU-2021:2427-1

  • kernel-source openSUSE Tumbleweed 5.14.6-1.4
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1
  • kernel-default openSUSE Leap 15.3 4.12.14-197.99.1
  • kernel-vanilla openSUSE Leap 15.3 4.12.14-197.99.1
  • kernel-kvmsmall openSUSE Leap 15.3 4.12.14-197.99.1
  • kernel-zfcpdump openSUSE Leap 15.3 4.12.14-197.99.1
  • kernel-64kb openSUSE Leap 15.3 5.3.18-59.5.2
  • kernel-syms openSUSE Leap 15.3 5.3.18-59.5.1

opensuse advisories openSUSE-SU-2024:10728-1openSUSE-SU-2024:13704-1openSUSE-SU-2021:2427-1openSUSE-SU-2021:1977-1openSUSE-SU-2021:1975-1openSUSE-SU-2021:0947-1

  • linux Arch Linux 5.12.9.arch1-1
  • linux-zen Arch Linux 5.12.9.zen1-1
  • linux-hardened Arch Linux 5.12.9.hardened1-1
  • linux-lts Arch Linux 5.10.42-1

arch linux advisories AVG-2031AVG-2032AVG-2033AVG-2034

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-24588 updated cvss 4.3

kernel: wifi frame payload being parsed incorrectly as an L2 frame

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-348.el8, kernel-debuginfo-common-aarch64 4.18.0-348.el8, kernel-debuginfo-common-ppc64le 4.18.0-348.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-348.el8, kernel 4.18.0-348.el8, bpftool 4.18.0-348.el8, kernel-core 4.18.0-348.el8, kernel-tools 4.18.0-348.el8, python3-perf 4.18.0-348.el8, +15 more
    fixed: vendor fix RHSA-2021:4356
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-348.rt7.130.el8, kernel-rt-core 4.18.0-348.rt7.130.el8, kernel-rt-modules 4.18.0-348.rt7.130.el8, kernel-rt-debug-core 4.18.0-348.rt7.130.el8, kernel-rt-debug-modules 4.18.0-348.rt7.130.el8, kernel-rt-modules-extra 4.18.0-348.rt7.130.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-348.rt7.130.el8, kernel-rt-kvm 4.18.0-348.rt7.130.el8, kernel-rt-core 4.18.0-348.rt7.130.el8, kernel-rt-modules 4.18.0-348.rt7.130.el8, kernel-rt-debug-kvm 4.18.0-348.rt7.130.el8, kernel-rt-debug-core 4.18.0-348.rt7.130.el8, +4 more
    fixed: vendor fix RHSA-2021:4140
  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-111-07 updated cvss 3.5

Siemens SCALANCE

  • Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AC0) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA0) < 6.6.0
    +34 more products
    Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA6) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AB0) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (USA) (6GK5734-1FX00-0AB6) < 6.6.0 Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AA0) < 6.6.0 Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AB0) < 6.6.0 Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AA0) < 6.6.0 Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AB0) < 6.6.0 Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TA0) < 6.6.0 Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TB0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA6) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AB0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AC0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (USA) (6GK5774-1FX00-0AB6) < 6.6.0 Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AA0) < 6.6.0 Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AB0) < 6.6.0 Siemens SCALANCE W778-1 M12 EEC (6GK5778-1GY00-0TA0) < 6.6.0 Siemens SCALANCE W778-1 M12 EEC (USA) (6GK5778-1GY00-0TB0) < 6.6.0 Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AA0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AB0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AC0) < 6.6.0 Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AA0) < 6.6.0 Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AB0) < 6.6.0 Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AA0) < 6.6.0 Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AB0) < 6.6.0 Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AA0) < 6.6.0 Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AB0) < 6.6.0 Siemens SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AA0) < 6.6.0
    affected: fixed in V6.6.0, mitigation support.industry.siemens.com

9 more affected in the full advisory

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-22-104-04 updated cvss 3.5

Siemens SCALANCE FragAttacks

  • Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AC0) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA0) < 6.6.0
    +34 more products
    Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA6) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AB0) < 6.6.0 Siemens SCALANCE W734-1 RJ45 (USA) (6GK5734-1FX00-0AB6) < 6.6.0 Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AA0) < 6.6.0 Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AB0) < 6.6.0 Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AA0) < 6.6.0 Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AB0) < 6.6.0 Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TA0) < 6.6.0 Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TB0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA6) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AB0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AC0) < 6.6.0 Siemens SCALANCE W774-1 RJ45 (USA) (6GK5774-1FX00-0AB6) < 6.6.0 Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AA0) < 6.6.0 Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AB0) < 6.6.0 Siemens SCALANCE W778-1 M12 EEC (6GK5778-1GY00-0TA0) < 6.6.0 Siemens SCALANCE W778-1 M12 EEC (USA) (6GK5778-1GY00-0TB0) < 6.6.0 Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AA0) < 6.6.0 Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AB0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AA0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AB0) < 6.6.0 Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AC0) < 6.6.0 Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AA0) < 6.6.0 Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AB0) < 6.6.0 Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AA0) < 6.6.0 Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AB0) < 6.6.0 Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AA0) < 6.6.0 Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AB0) < 6.6.0 Siemens SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AA0) < 6.6.0
    affected: fixed in V6.6.0, mitigation support.industry.siemens.com

27 more affected in the full advisory

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-22-102-04 updated cvss 3.5

Mitsubishi Electric GT25-WLAN

  • Mitsubishi Electric GT25-WLAN <= 01.39.000
    affected: mitigation “For users who use the affected products and versions, please update to the fixed versions” mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

cisa ICSA-21-236-01 updated cvss 3.5

Hitachi ABB Power Grids TropOS

  • Hitachi Energy TropOS <= 8.9.4.8
    affected: vendor fix, mitigation “Where Wi-Fi access is required, wherever possible ensure physical access to the local area is restricted to approved staff only.” search.abb.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.61% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • fragattacks.com https://www.fragattacks.com referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 3.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 2.0 2.9 AV:A/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Siemens SCALANCE W1748-1 M12
  • Siemens SCALANCE W1750D (JP)
  • Siemens SCALANCE W1750D (ROW)
  • Siemens SCALANCE W1750D (USA)
  • Siemens SCALANCE W1788-1 M12
  • Siemens SCALANCE W1788-2 EEC M12
  • Siemens SCALANCE W1788-2 M12
  • Siemens SCALANCE W1788-2IA M12
  • Siemens SCALANCE W721-1 RJ45
  • Siemens SCALANCE W722-1 RJ45
  • Siemens SCALANCE W734-1 RJ45
  • Siemens SCALANCE W734-1 RJ45 (USA)
  • Siemens SCALANCE W738-1 M12
  • Siemens SCALANCE W748-1 M12
  • Siemens SCALANCE W748-1 RJ45
  • Siemens SCALANCE W761-1 RJ45
  • Siemens SCALANCE W774-1 M12 EEC
  • Siemens SCALANCE W774-1 RJ45
  • Siemens SCALANCE W774-1 RJ45 (USA)
  • Siemens SCALANCE W778-1 M12
  • Siemens SCALANCE W778-1 M12 EEC
  • Siemens SCALANCE W778-1 M12 EEC (USA)
  • Siemens SCALANCE W786-1 RJ45
  • Siemens SCALANCE W786-2 RJ45
  • Siemens SCALANCE W786-2 SFP
  • Siemens SCALANCE W786-2IA RJ45
  • Siemens SCALANCE W788-1 M12
  • Siemens SCALANCE W788-1 RJ45
  • Siemens SCALANCE W788-2 M12
  • Siemens SCALANCE W788-2 M12 EEC
  • Siemens SCALANCE W788-2 RJ45
  • Siemens SCALANCE WAM763-1
  • Siemens SCALANCE WAM766-1
  • Siemens SCALANCE WAM766-1 (US)
  • Siemens SCALANCE WAM766-1 EEC
  • Siemens SCALANCE WAM766-1 EEC (US)
  • Siemens SCALANCE WUM763-1
  • Siemens SCALANCE WUM766-1
  • Siemens SCALANCE WUM766-1 (USA)

Classification

Weakness
  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.