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cnvd-2021-16938
Vulnerability from cnvd
Title: grub2数据伪造问题漏洞
Description:
grub2是GNU计划的一款Linux系统引导程序。
GRUB2 2.04及之前版本中存在数据伪造问题漏洞。该漏洞源于当无shim直接启动时，程序未验证内核签名。攻击者可利用该漏洞绕过安全启动。
Severity: 中
Patch Name: grub2数据伪造问题漏洞的补丁
Patch Description:
grub2是GNU计划的一款Linux系统引导程序。
GRUB2 2.04及之前版本中存在数据伪造问题漏洞。该漏洞源于当无shim直接启动时，程序未验证内核签名。攻击者可利用该漏洞绕过安全启动。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:
厂商已发布了漏洞修复程序，请及时关注更新： https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
Reference: http://www.openwall.com/lists/oss-security/2020/07/29/3
Impacted products
| Name | GNU GRUB2 <=2.04 |
|---|
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CVE-2020-15705 (GCVE-0-2020-15705)
Vulnerability from cvelistv5
Published
2020-07-29 17:45
Modified
2024-09-17 00:06
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Summary
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Ubuntu | grub2 in Ubuntu |
Version: 20.04 LTS < 2.04-1ubuntu26.1 Version: 18.04 LTS < 2.02-2ubuntu8.16 Version: 16.04 LTS < 2.02~beta2-36ubuntu3.26 Version: 14.04 ESM < 2.02~beta2-9ubuntu1.20 |
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"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/03/02/3"
},
{
"name": "GLSA-202104-05",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202104-05"
},
{
"name": "[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
},
{
"name": "[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
},
{
"name": "[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
}
]
},
"source": {
"advisory": "USN 4432-1",
"defect": [
"https://launchpad.net/bugs/1801968"
],
"discovery": "INTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2020-15705",
"datePublished": "2020-07-29T17:45:33.422001Z",
"dateReserved": "2020-07-14T00:00:00",
"dateUpdated": "2024-09-17T00:06:01.169Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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