cnvd - cnvd-2020-61947

cnvd-2020-61947

Vulnerability from cnvd

Title: Cisco IOS XR -bit Preboot eXecution Environment访问控制错误漏洞

Description:

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。

Cisco IOS XR 64-bit Preboot eXecution Environment 存在安全漏洞，攻击者可以利用该漏洞通过Cisco IOS XR 64位的Preboot eXecution Environment绕过限制，以提升其特权。

Severity: 高

Patch Name: Cisco IOS XR -bit Preboot eXecution Environment访问控制错误漏洞的补丁

Patch Description:

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。

Cisco IOS XR 64-bit Preboot eXecution Environment 存在安全漏洞，攻击者可以利用该漏洞通过Cisco IOS XR 64位的Preboot eXecution Environment绕过限制，以提升其特权。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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-3284

Impacted products

Name
Cisco IOS XR

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2020-3284",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-3284"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-61947",
  "openTime": "2020-11-11",
  "patchDescription": "Cisco IOS XR\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e3a\u5176\u7f51\u7edc\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nCisco IOS XR 64-bit Preboot eXecution Environment \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7Cisco IOS XR 64\u4f4d\u7684Preboot eXecution Environment\u7ed5\u8fc7\u9650\u5236\uff0c\u4ee5\u63d0\u5347\u5176\u7279\u6743\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",
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  "products": {
    "product": "Cisco IOS XR"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-3284",
  "serverity": "\u9ad8",
  "submitTime": "2020-11-05",
  "title": "Cisco IOS XR -bit Preboot eXecution Environment\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-3284 (GCVE-0-2020-3284)

Vulnerability from cvelistv5

Published

2020-11-06 18:16

Modified

2024-11-13 17:43

Severity ?

8.1 (High) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-284

Summary

A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code is included in Cisco IOS XR Software but might require additional installation steps. For further information, see the Fixed Software section of this advisory.

References

▼	URL	Tags
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2	vendor-advisory, x_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco IOS XR Software	Version: n/a

Show details on NVD website

JSON

To clipboard

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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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