cnvd - cnvd-2021-10482

cnvd-2021-10482

Vulnerability from cnvd

Title: sthttpd拒绝服务漏洞

Description:

sthttpd是thttpd的改进版，这是一个小型、简单、快速且安全的HTTP服务器实现，支持 HTTP/1.1。

sthttpd 2.27.1及之前版本存在拒绝服务漏洞。该漏洞与受影响版本de_dotdot函数处理内存错误有关。在使用memcpy实现strcpy函数的系统上，将重叠的内存范围传递给了memcpy，de_dotdot函数就可能会导致拒绝服务（守护程序崩溃）。攻击者可利用该漏洞通过对精心设计的文件名的HTTP GET请求来触发拒绝服务漏洞。

Severity: 中

Formal description:

厂商尚未提供漏洞修复方案，请关注厂商主页更新：https://github.com/blueness/sthttpd/issues/14

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-26843

Impacted products

Name
sthttpd sthttpd <=2.27.1

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    "cve": {
      "cveNumber": "CVE-2021-26843",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26843"
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  "description": "sthttpd\u662fthttpd\u7684\u6539\u8fdb\u7248\uff0c\u8fd9\u662f\u4e00\u4e2a\u5c0f\u578b\u3001\u7b80\u5355\u3001\u5feb\u901f\u4e14\u5b89\u5168\u7684HTTP\u670d\u52a1\u5668\u5b9e\u73b0\uff0c\u652f\u6301 HTTP/1.1\u3002\n\nsthttpd 2.27.1\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4e0e\u53d7\u5f71\u54cd\u7248\u672cde_dotdot\u51fd\u6570\u5904\u7406\u5185\u5b58\u9519\u8bef\u6709\u5173\u3002\u5728\u4f7f\u7528memcpy\u5b9e\u73b0strcpy\u51fd\u6570\u7684\u7cfb\u7edf\u4e0a\uff0c\u5c06\u91cd\u53e0\u7684\u5185\u5b58\u8303\u56f4\u4f20\u9012\u7ed9\u4e86memcpy\uff0cde_dotdot\u51fd\u6570\u5c31\u53ef\u80fd\u4f1a\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\uff08\u5b88\u62a4\u7a0b\u5e8f\u5d29\u6e83\uff09\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u5bf9\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u6587\u4ef6\u540d\u7684HTTP GET\u8bf7\u6c42\u6765\u89e6\u53d1\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1ahttps://github.com/blueness/sthttpd/issues/14",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-10482",
  "openTime": "2021-02-10",
  "products": {
    "product": "sthttpd sthttpd \u003c=2.27.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-26843",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-09",
  "title": "sthttpd\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2021-26843 (GCVE-0-2021-26843)

Vulnerability from cvelistv5

Published

2021-02-07 20:14

Modified

2024-08-03 20:33

Severity ?

CWE

Summary

An issue was discovered in sthttpd through 2.27.1. On systems where the strcpy function is implemented with memcpy, the de_dotdot function may cause a Denial-of-Service (daemon crash) due to overlapping memory ranges being passed to memcpy. This can triggered with an HTTP GET request for a crafted filename. NOTE: this is similar to CVE-2017-10671, but occurs in a different part of the de_dotdot function.

References

▼	URL	Tags
	https://github.com/blueness/sthttpd/issues/14	x_refsource_MISC

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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