cnvd - cnvd-2020-45111

cnvd-2020-45111

Vulnerability from cnvd

Title: grub2堆缓冲区溢出漏洞（CNVD-2020-45111）

Description:

GRUB2是一款引导加载程序。

grub2 2.06之前版本中的read_section_as_string()函数存在堆缓冲区溢出漏洞。攻击者可通过名称为UINT32_MAX的恶意字体文件利用该漏洞导致算术溢出和零大小分配，从而可导致堆缓冲区溢出。

Severity: 低

Patch Name: grub2堆缓冲区溢出漏洞（CNVD-2020-45111）的补丁

Patch Description:

GRUB2是一款引导加载程序。

grub2 2.06之前版本中的read_section_as_string()函数存在堆缓冲区溢出漏洞。攻击者可通过名称为UINT32_MAX的恶意字体文件利用该漏洞导致算术溢出和零大小分配，从而可导致堆缓冲区溢出。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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-14310

Impacted products

Name
GNU GRUB2 <2.06

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-14310",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-14310"
    }
  },
  "description": "GRUB2\u662f\u4e00\u6b3e\u5f15\u5bfc\u52a0\u8f7d\u7a0b\u5e8f\u3002\n\ngrub2 2.06\u4e4b\u524d\u7248\u672c\u4e2d\u7684read_section_as_string()\u51fd\u6570\u5b58\u5728\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u540d\u79f0\u4e3aUINT32_MAX\u7684\u6076\u610f\u5b57\u4f53\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7b97\u672f\u6ea2\u51fa\u548c\u96f6\u5927\u5c0f\u5206\u914d\uff0c\u4ece\u800c\u53ef\u5bfc\u81f4\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-45111",
  "openTime": "2020-08-09",
  "patchDescription": "GRUB2\u662f\u4e00\u6b3e\u5f15\u5bfc\u52a0\u8f7d\u7a0b\u5e8f\u3002\r\n\r\ngrub2 2.06\u4e4b\u524d\u7248\u672c\u4e2d\u7684read_section_as_string()\u51fd\u6570\u5b58\u5728\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u540d\u79f0\u4e3aUINT32_MAX\u7684\u6076\u610f\u5b57\u4f53\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7b97\u672f\u6ea2\u51fa\u548c\u96f6\u5927\u5c0f\u5206\u914d\uff0c\u4ece\u800c\u53ef\u5bfc\u81f4\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\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": "grub2\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-45111\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "GNU GRUB2 \u003c2.06"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-14310",
  "serverity": "\u4f4e",
  "submitTime": "2020-08-03",
  "title": "grub2\u5806\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2020-45111\uff09"
}

CVE-2020-14310 (GCVE-0-2020-14310)

Vulnerability from cvelistv5

Published

2020-07-31 20:55

Modified

2024-08-04 12:39

Severity ?

5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

CWE

Summary

There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	The Grub2 Project	grub2	Version: 2.06

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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