cnvd - cnvd-2020-66306

cnvd-2020-66306

Vulnerability from cnvd

Title: Linux kernel slab越界读取漏洞

Description:

Linux kernel是一种计算机操作系统内核，以C语言和汇编语言写成，符合POSIX标准，按GNU通用公共许可证发行。

Linux kernel 5.9.7之前版本中的fbcon存在slab越界读取漏洞。该漏洞源于drivers/tty/vt/vt.c中的KD_FONT_OP_COPY可用于诸如字体高度之类的操作。本地攻击者可利用该漏洞越权读取信息或导致内核崩溃。

Severity: 低

Patch Name: Linux kernel slab越界读取漏洞的补丁

Patch Description:

Linux kernel是一种计算机操作系统内核，以C语言和汇编语言写成，符合POSIX标准，按GNU通用公共许可证发行。

Linux kernel 5.9.7之前版本中的fbcon存在slab越界读取漏洞。该漏洞源于drivers/tty/vt/vt.c中的KD_FONT_OP_COPY可用于诸如字体高度之类的操作。本地攻击者可利用该漏洞越权读取信息或导致内核崩溃。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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-28974

Impacted products

Name
Linux Linux kernel <5.9.7

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-28974",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-28974"
    }
  },
  "description": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\n\nLinux kernel 5.9.7\u4e4b\u524d\u7248\u672c\u4e2d\u7684fbcon\u5b58\u5728slab\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8edrivers/tty/vt/vt.c\u4e2d\u7684KD_FONT_OP_COPY\u53ef\u7528\u4e8e\u8bf8\u5982\u5b57\u4f53\u9ad8\u5ea6\u4e4b\u7c7b\u7684\u64cd\u4f5c\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8d8a\u6743\u8bfb\u53d6\u4fe1\u606f\u6216\u5bfc\u81f4\u5185\u6838\u5d29\u6e83\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-66306",
  "openTime": "2020-11-25",
  "patchDescription": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\nLinux kernel 5.9.7\u4e4b\u524d\u7248\u672c\u4e2d\u7684fbcon\u5b58\u5728slab\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8edrivers/tty/vt/vt.c\u4e2d\u7684KD_FONT_OP_COPY\u53ef\u7528\u4e8e\u8bf8\u5982\u5b57\u4f53\u9ad8\u5ea6\u4e4b\u7c7b\u7684\u64cd\u4f5c\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8d8a\u6743\u8bfb\u53d6\u4fe1\u606f\u6216\u5bfc\u81f4\u5185\u6838\u5d29\u6e83\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 slab\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.9.7"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-28974",
  "serverity": "\u4f4e",
  "submitTime": "2020-11-23",
  "title": "Linux kernel slab\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e"
}

CVE-2020-28974 (GCVE-0-2020-28974)

Vulnerability from cvelistv5

Published

2020-11-20 17:49

Modified

2024-08-04 16:48

Severity ?

CWE

Summary

A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804	x_refsource_MISC
	https://seclists.org/oss-sec/2020/q4/104	x_refsource_MISC
	https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2020/11/25/1	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20210108-0003/	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	n/a	n/a	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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