cnvd - cnvd-2017-30426

cnvd-2017-30426

Vulnerability from cnvd

Title: libxfont拒绝服务漏洞

Description:

libXfont是X.Org基金会的一个用于服务器和实用程序的X字体处理库。

libXfont 1.5.2及之前的版本和2.0.2之前的2.x版本中的fontfile/fontdir.c文件的‘PatternMatch’函数存在拒绝服务漏洞。攻击者可利用该漏洞造成拒绝服务或获取信息（缓冲区越边界读取和崩溃）。

Severity: 中

Patch Name: libxfont拒绝服务漏洞的补丁

Patch Description:

libXfont是X.Org基金会的一个用于服务器和实用程序的X字体处理库。

libXfont 1.5.2及之前的版本和2.0.2之前的2.x版本中的fontfile/fontdir.c文件的‘PatternMatch’函数存在拒绝服务漏洞。攻击者可利用该漏洞造成拒绝服务或获取信息（缓冲区越边界读取和崩溃）。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:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608

Reference: http://seclists.org/bugtraq/2017/Oct/18

Impacted products

Name
['Libxfont libXfont <=1.5.2', 'Libxfont libXfont 2.*，<2.0.2']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-13720"
    }
  },
  "description": "libXfont\u662fX.Org\u57fa\u91d1\u4f1a\u7684\u4e00\u4e2a\u7528\u4e8e\u670d\u52a1\u5668\u548c\u5b9e\u7528\u7a0b\u5e8f\u7684X\u5b57\u4f53\u5904\u7406\u5e93\u3002\r\n\r\nlibXfont 1.5.2\u53ca\u4e4b\u524d\u7684\u7248\u672c\u548c2.0.2\u4e4b\u524d\u76842.x\u7248\u672c\u4e2d\u7684fontfile/fontdir.c\u6587\u4ef6\u7684\u2018PatternMatch\u2019\u51fd\u6570\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u6216\u83b7\u53d6\u4fe1\u606f\uff08\u7f13\u51b2\u533a\u8d8a\u8fb9\u754c\u8bfb\u53d6\u548c\u5d29\u6e83\uff09\u3002",
  "discovererName": "Andrej Nemec",
  "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://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-30426",
  "openTime": "2017-10-17",
  "patchDescription": "libXfont\u662fX.Org\u57fa\u91d1\u4f1a\u7684\u4e00\u4e2a\u7528\u4e8e\u670d\u52a1\u5668\u548c\u5b9e\u7528\u7a0b\u5e8f\u7684X\u5b57\u4f53\u5904\u7406\u5e93\u3002\r\n\r\nlibXfont 1.5.2\u53ca\u4e4b\u524d\u7684\u7248\u672c\u548c2.0.2\u4e4b\u524d\u76842.x\u7248\u672c\u4e2d\u7684fontfile/fontdir.c\u6587\u4ef6\u7684\u2018PatternMatch\u2019\u51fd\u6570\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u6216\u83b7\u53d6\u4fe1\u606f\uff08\u7f13\u51b2\u533a\u8d8a\u8fb9\u754c\u8bfb\u53d6\u548c\u5d29\u6e83\uff09\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": "libxfont\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Libxfont libXfont \u003c=1.5.2",
      "Libxfont libXfont 2.*\uff0c\u003c2.0.2"
    ]
  },
  "referenceLink": "http://seclists.org/bugtraq/2017/Oct/18",
  "serverity": "\u4e2d",
  "submitTime": "2017-10-12",
  "title": "libxfont\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2017-13720 (GCVE-0-2017-13720)

Vulnerability from cvelistv5

Published

2017-10-11 17:00

Modified

2024-08-05 19:05

Severity ?

CWE

Summary

In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters.

References

▼	URL	Tags
	http://www.debian.org/security/2017/dsa-3995	vendor-advisory, x_refsource_DEBIAN
	https://bugzilla.redhat.com/show_bug.cgi?id=1500690	x_refsource_CONFIRM
	https://bugzilla.suse.com/show_bug.cgi?id=1054285	x_refsource_CONFIRM
	https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2	x_refsource_CONFIRM
	https://security.gentoo.org/glsa/201711-08	vendor-advisory, x_refsource_GENTOO
	https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608	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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          }
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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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