CVE-2020-26147 (GCVE-0-2020-26147)
Vulnerability from cvelistv5 – Published: 2021-05-11 19:40 – Updated: 2026-04-14 09:01
VLAI
EPSS
VEX
Summary
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.
Severity
5.4 (Medium)
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
| https://www.fragattacks.com | x_refsource_MISC |
| https://github.com/vanhoefm/fragattacks/blob/mast… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2021/0… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.arista.com/en/support/advisories-noti… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/html/… | |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
28 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | SCALANCE W1748-1 M12 |
Affected:
0 , < V3.0.0
(custom)
|
|
| Siemens | SCALANCE W1788-1 M12 |
Affected:
0 , < V3.0.0
(custom)
|
|
| Siemens | SCALANCE W1788-2 EEC M12 |
Affected:
0 , < V3.0.0
(custom)
|
|
| Siemens | SCALANCE W1788-2 M12 |
Affected:
0 , < V3.0.0
(custom)
|
|
| Siemens | SCALANCE W1788-2IA M12 |
Affected:
0 , < V3.0.0
(custom)
|
|
| Siemens | SCALANCE W721-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W722-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W734-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W734-1 RJ45 (USA) |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W738-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W748-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W748-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W761-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W774-1 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W774-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W774-1 RJ45 (USA) |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W778-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W778-1 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W778-1 M12 EEC (USA) |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W786-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W786-2 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W786-2 SFP |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W786-2IA RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W788-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W788-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W788-2 M12 |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W788-2 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
|
| Siemens | SCALANCE W788-2 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
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"tags": [
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"tags": [
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"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf"
},
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],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63"
}
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},
{
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"versions": [
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},
{
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"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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},
{
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"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
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"lessThan": "V6.6.0",
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{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W734-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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"product": "SCALANCE W734-1 RJ45",
"vendor": "Siemens",
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"vendor": "Siemens",
"versions": [
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"vendor": "Siemens",
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{
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"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
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"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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{
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"vendor": "Siemens",
"versions": [
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{
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"vendor": "Siemens",
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{
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{
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{
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"vendor": "Siemens",
"versions": [
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]
},
{
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"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
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},
{
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"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
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},
{
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"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
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}
]
},
{
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"vendor": "Siemens",
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{
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}
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},
{
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"vendor": "Siemens",
"versions": [
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]
},
{
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{
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"vendor": "Siemens",
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},
{
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"vendor": "Siemens",
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]
},
{
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"vendor": "Siemens",
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"version": "0",
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},
{
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"vendor": "Siemens",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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