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CNVD-2021-34677
Vulnerability from cnvd - Published: 2021-05-14
VLAI Severity ?
Title
Linux kernel输入验证错误漏洞 （CNVD-2021-34677）
Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel 5.8.9版本存在安全漏洞。该漏洞源于当设备发送分段的帧并且使用WEP，CCMP或GCMP数据机密协议时，攻击者可以利用此漏洞来注入数据包或泄露选定的片段。
Severity
中
Patch Name
Linux kernel输入验证错误漏洞 （CNVD-2021-34677）的补丁
Patch Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel 5.8.9版本存在安全漏洞。该漏洞源于当设备发送分段的帧并且使用WEP，CCMP或GCMP数据机密协议时，攻击者可以利用此漏洞来注入数据包或泄露选定的片段。 目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description
目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://www.wi-fi.org/security-update-fragmentation
Reference
https://nvd.nist.gov/vuln/detail/CVE-2020-26147
Impacted products
| Name | Linux Linux kernel 5.8.9 |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2020-26147"
}
},
"description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel 5.8.9\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u8bbe\u5907\u53d1\u9001\u5206\u6bb5\u7684\u5e27\u5e76\u4e14\u4f7f\u7528WEP\uff0cCCMP\u6216GCMP\u6570\u636e\u673a\u5bc6\u534f\u8bae\u65f6\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u6b64\u6f0f\u6d1e\u6765\u6ce8\u5165\u6570\u636e\u5305\u6216\u6cc4\u9732\u9009\u5b9a\u7684\u7247\u6bb5\u3002",
"formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://www.wi-fi.org/security-update-fragmentation",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2021-34677",
"openTime": "2021-05-14",
"patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 5.8.9\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u8bbe\u5907\u53d1\u9001\u5206\u6bb5\u7684\u5e27\u5e76\u4e14\u4f7f\u7528WEP\uff0cCCMP\u6216GCMP\u6570\u636e\u673a\u5bc6\u534f\u8bae\u65f6\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u6b64\u6f0f\u6d1e\u6765\u6ce8\u5165\u6570\u636e\u5305\u6216\u6cc4\u9732\u9009\u5b9a\u7684\u7247\u6bb5\u3002 \u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
"patchName": "Linux kernel\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e \uff08CNVD-2021-34677\uff09\u7684\u8865\u4e01",
"products": {
"product": "Linux Linux kernel 5.8.9"
},
"referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-26147",
"serverity": "\u4e2d",
"submitTime": "2021-05-14",
"title": "Linux kernel\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e \uff08CNVD-2021-34677\uff09"
}
CVE-2020-26147 (GCVE-0-2020-26147)
Vulnerability from cvelistv5 – Published: 2021-05-11 19:40 – Updated: 2026-04-14 09:01
VLAI?
EPSS
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 ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T15:49:07.202Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021",
"tags": [
"vendor-advisory",
"x_refsource_CISCO",
"x_transferred"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.fragattacks.com"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md"
},
{
"name": "[oss-security] 20210511 various 802.11 security issues - fragattacks.com",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2021/05/11/12"
},
{
"name": "[debian-lts-announce] 20210623 [SECURITY] [DLA 2689-1] linux security update",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html"
},
{
"name": "[debian-lts-announce] 20210623 [SECURITY] [DLA 2690-1] linux-4.19 security update",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"defaultStatus": "unknown",
"product": "SCALANCE W1748-1 M12",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
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"product": "SCALANCE W1748-1 M12",
"vendor": "Siemens",
"versions": [
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"version": "0",
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}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-1 M12",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-2 EEC M12",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
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]
},
{
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},
{
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"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
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"status": "affected",
"version": "0",
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}
]
},
{
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}
]
},
{
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}
]
},
{
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},
{
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},
{
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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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},
{
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{
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{
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},
{
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{
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}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W734-1 RJ45 (USA)",
"vendor": "Siemens",
"versions": [
{
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}
]
},
{
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"product": "SCALANCE W734-1 RJ45 (USA)",
"vendor": "Siemens",
"versions": [
{
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}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
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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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]
},
{
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"vendor": "Siemens",
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{
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{
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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 W774-1 RJ45",
"vendor": "Siemens",
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{
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"version": "0",
"versionType": "custom"
}
]
},
{
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"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
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"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
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"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
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"vendor": "Siemens",
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]
},
{
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{
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Sightings
| Author | Source | Type | Date |
|---|
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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