Vulnerability Monitor

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CVE-2020-26147

An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.4, indicating it requires adjacent network access but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, integrity (unauthorized modifications), for affected systems. Impacting 14 products from linux, from debian, from arista and 11 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-05-11T20:15:08.947

Last Modified

2024-11-21T05:19:22.380

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.4 (MEDIUM)

CVSSv2 Vector

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

Access Vector: ADJACENT_NETWORK
Access Complexity: HIGH
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

3.2

Impact Score

4.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	< 4.4.271	Yes
Operating System	linux	linux_kernel	< 4.9.271	Yes
Operating System	linux	linux_kernel	< 4.14.235	Yes
Operating System	linux	linux_kernel	< 4.19.193	Yes
Operating System	linux	linux_kernel	< 5.4.124	Yes
Operating System	linux	linux_kernel	< 5.10.42	Yes
Operating System	linux	linux_kernel	< 5.12.9	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	arista	c-75_firmware	-	Yes
Hardware	arista	c-75	-	No
Operating System	arista	o-90_firmware	-	Yes
Hardware	arista	o-90	-	No
Operating System	arista	c-65_firmware	-	Yes
Hardware	arista	c-65	-	No
Operating System	arista	w-68_firmware	-	Yes
Hardware	arista	w-68	-	No
Operating System	siemens	scalance_w700_ieee_802.11n_firmware	*	Yes
Hardware	siemens	scalance_w700_ieee_802.11n	-	No
Operating System	siemens	scalance_w1700_ieee_802.11ac_firmware	*	Yes
Hardware	siemens	scalance_w1700_ieee_802.11ac	-	No

References

http://www.openwall.com/lists/oss-security/2021/05/11/12 Mailing List, Patch, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Third Party Advisory ([email protected])
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing List, Third Party Advisory ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu Third Party Advisory ([email protected])
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 Third Party Advisory ([email protected])
https://www.fragattacks.com Product ([email protected])
http://www.openwall.com/lists/oss-security/2021/05/11/12 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.fragattacks.com Product (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.