cnvd - cnvd-2019-02670

cnvd-2019-02670

Vulnerability from cnvd

Title: xkbcommon空指针解引用漏洞（CNVD-2019-02670）

Description:

xkbcommon是一个键盘键映射编译器和支持库。

xkbcommon0.8.2之前版本中的xkbcomp/expr.c文件的‘LookupModMask’函数存在空指针解引用漏洞，本地攻击者可通过提交含有无效virtual修饰符的特制的keymap文件利用该漏洞造成xkbcommon解析器崩溃（空指针逆向引用）。

Severity: 低

Patch Name: xkbcommon空指针解引用漏洞（CNVD-2019-02670）的补丁

Patch Description:

xkbcommon是一个键盘键映射编译器和支持库。

xkbcommon0.8.2之前版本中的xkbcomp/expr.c文件的‘LookupModMask’函数存在空指针解引用漏洞，本地攻击者可通过提交含有无效virtual修饰符的特制的keymap文件利用该漏洞造成xkbcommon解析器崩溃（空指针逆向引用）。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://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371

Reference: https://nvd.nist.gov/vuln/detail/CVE-2018-15862

Impacted products

Name
xkbcommon xkbcommon <0.8.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-15862"
    }
  },
  "description": "xkbcommon\u662f\u4e00\u4e2a\u952e\u76d8\u952e\u6620\u5c04\u7f16\u8bd1\u5668\u548c\u652f\u6301\u5e93\u3002\n\nxkbcommon0.8.2\u4e4b\u524d\u7248\u672c\u4e2d\u7684xkbcomp/expr.c\u6587\u4ef6\u7684\u2018LookupModMask\u2019\u51fd\u6570\u5b58\u5728\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u63d0\u4ea4\u542b\u6709\u65e0\u6548virtual\u4fee\u9970\u7b26\u7684\u7279\u5236\u7684keymap\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210xkbcommon\u89e3\u6790\u5668\u5d29\u6e83\uff08\u7a7a\u6307\u9488\u9006\u5411\u5f15\u7528\uff09\u3002",
  "discovererName": "fooishbar",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-02670",
  "openTime": "2019-01-24",
  "patchDescription": "xkbcommon\u662f\u4e00\u4e2a\u952e\u76d8\u952e\u6620\u5c04\u7f16\u8bd1\u5668\u548c\u652f\u6301\u5e93\u3002\r\n\r\nxkbcommon0.8.2\u4e4b\u524d\u7248\u672c\u4e2d\u7684xkbcomp/expr.c\u6587\u4ef6\u7684\u2018LookupModMask\u2019\u51fd\u6570\u5b58\u5728\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u63d0\u4ea4\u542b\u6709\u65e0\u6548virtual\u4fee\u9970\u7b26\u7684\u7279\u5236\u7684keymap\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210xkbcommon\u89e3\u6790\u5668\u5d29\u6e83\uff08\u7a7a\u6307\u9488\u9006\u5411\u5f15\u7528\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": "xkbcommon\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2019-02670\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "xkbcommon xkbcommon \u003c0.8.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-15862",
  "serverity": "\u4f4e",
  "submitTime": "2018-08-27",
  "title": "xkbcommon\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2019-02670\uff09"
}

CVE-2018-15862 (GCVE-0-2018-15862)

Vulnerability from cvelistv5

Published

2018-08-25 21:00

Modified

2024-08-05 10:10

Severity ?

CWE

Summary

Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with invalid virtual modifiers.

References

▼	URL	Tags
	https://security.gentoo.org/glsa/201810-05	vendor-advisory, x_refsource_GENTOO
	https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html	x_refsource_MISC
	https://usn.ubuntu.com/3786-1/	vendor-advisory, x_refsource_UBUNTU
	https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371	x_refsource_MISC
	https://usn.ubuntu.com/3786-2/	vendor-advisory, x_refsource_UBUNTU
	https://access.redhat.com/errata/RHSA-2019:2079	vendor-advisory, x_refsource_REDHAT

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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            "url": "https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371"
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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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