medium
5.3
CWE
307 20
Advisory Published
CVE Published
Updated

CVE-2020-26146: Input Validation

First published: Tue May 11 2021(Updated: )

A vulnerability was found in Linux kernel, where the WiFi implementation reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-348.rt7.130.el8
0:4.18.0-348.rt7.130.el8
redhat/kernel<0:4.18.0-348.el8
0:4.18.0-348.el8
Samsung Galaxy I9305 Firmware=4.4.4
Samsung Galaxy I9305
Arista C-250 Firmware<10.0.1-31
Arista C-250
Arista C-260 Firmware<10.0.1-31
Arista C-260
Arista C-230 Firmware<10.0.1-31
Arista C-230
Arista C-235 Firmware<10.0.1-31
Arista C-235
Arista C-200 Firmware<11.0.0-36
Arista C-200
Arista C-120 Firmware<11.0.0-36
Arista C-120
Arista C-130 Firmware<11.0.0-36
Arista C-130
Arista C-100 Firmware<11.0.0-36
Arista C-100
Arista C-110 Firmware<11.0.0-36
Arista C-110
Arista O-105 Firmware<11.0.0-36
Arista O-105
Arista W-118 Firmware<11.0.0-36
Arista W-118
Arista C-75 Firmware
Arista C-75
Arista O-90 Firmware
Arista O-90
Arista C-65 Firmware
Arista C-65
Arista W-68 Firmware
Arista W-68
Siemens Scalance W700 Ieee 802.11n Firmware
Siemens SCALANCE W700 IEEE 802.11n
Siemens Scalance W1700 Ieee 802.11ac Firmware
Siemens Scalance W1700 Ieee 802.11ac
Siemens Scalance W1750d Firmware<8.7.1.3
Siemens SCALANCE W1750D

Remedy

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2020-26146.

  • What is the severity of CVE-2020-26146?

    The severity of CVE-2020-26146 is high with a severity value of 5.3.

  • Which devices are affected by CVE-2020-26146?

    The Samsung Galaxy S3 i9305 with firmware version 4.4.4 is affected by CVE-2020-26146.

  • How can an adversary exploit this vulnerability?

    An adversary can exploit CVE-2020-26146 by abusing the WiFi implementation to exfiltrate selected fragments.

  • Where can I find more information about CVE-2020-26146?

    You can find more information about CVE-2020-26146 on the following references: [Reference 1](https://lore.kernel.org/linux-wireless/20210511180259.159598-1-johannes@sipsolutions.net/), [Reference 2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1960503), [Reference 3](https://access.redhat.com/errata/RHSA-2021:4140)

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