Vulnerability-Lookup

CNVD-2018-08420

Vulnerability from cnvd - Published: 2018-04-26

Title

libxml2拒绝服务漏洞（CNVD-2018-08420）

Description

libxml2是GNOME项目组所研发的一个基于C语言的用来解析XML文档的函数库，它支持多种编码格式、Xpath解析、Well-formed和valid验证等。 libxml2 2.9.6之前版本中的xzlib.c文件的‘xz_head’函数存在安全漏洞，该漏洞源于程序未能对合法文件限制内存的使用。远程攻击者可借助特制的LZMA文件利用该漏洞造成拒绝服务（内存消耗）。

Severity

中

Patch Name

libxml2拒绝服务漏洞（CNVD-2018-08420）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： http://xmlsoft.org/ /?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb

Reference

https://nvd.nist.gov/vuln/detail/CVE-2017-18258

Impacted products

Name
XMLSoft Libxml2 <2.9.6

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-18258"
    }
  },
  "description": "libxml2\u662fGNOME\u9879\u76ee\u7ec4\u6240\u7814\u53d1\u7684\u4e00\u4e2a\u57fa\u4e8eC\u8bed\u8a00\u7684\u7528\u6765\u89e3\u6790XML\u6587\u6863\u7684\u51fd\u6570\u5e93\uff0c\u5b83\u652f\u6301\u591a\u79cd\u7f16\u7801\u683c\u5f0f\u3001Xpath\u89e3\u6790\u3001Well-formed\u548cvalid\u9a8c\u8bc1\u7b49\u3002\r\n\r\nlibxml2 2.9.6\u4e4b\u524d\u7248\u672c\u4e2d\u7684xzlib.c\u6587\u4ef6\u7684\u2018xz_head\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5bf9\u5408\u6cd5\u6587\u4ef6\u9650\u5236\u5185\u5b58\u7684\u4f7f\u7528\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684LZMA\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5185\u5b58\u6d88\u8017\uff09\u3002",
  "discovererName": "Unknow",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttp://xmlsoft.org/ /?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-08420",
  "openTime": "2018-04-26",
  "patchDescription": "libxml2\u662fGNOME\u9879\u76ee\u7ec4\u6240\u7814\u53d1\u7684\u4e00\u4e2a\u57fa\u4e8eC\u8bed\u8a00\u7684\u7528\u6765\u89e3\u6790XML\u6587\u6863\u7684\u51fd\u6570\u5e93\uff0c\u5b83\u652f\u6301\u591a\u79cd\u7f16\u7801\u683c\u5f0f\u3001Xpath\u89e3\u6790\u3001Well-formed\u548cvalid\u9a8c\u8bc1\u7b49\u3002\r\n\r\nlibxml2 2.9.6\u4e4b\u524d\u7248\u672c\u4e2d\u7684xzlib.c\u6587\u4ef6\u7684\u2018xz_head\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5bf9\u5408\u6cd5\u6587\u4ef6\u9650\u5236\u5185\u5b58\u7684\u4f7f\u7528\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684LZMA\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5185\u5b58\u6d88\u8017\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": "libxml2\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2018-08420\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "XMLSoft Libxml2 \u003c2.9.6"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2017-18258",
  "serverity": "\u4e2d",
  "submitTime": "2018-04-09",
  "title": "libxml2\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2018-08420\uff09"
}

CVE-2017-18258 (GCVE-0-2017-18258)

Vulnerability from cvelistv5 – Published: 2018-04-08 17:00 – Updated: 2024-08-05 21:13

Summary

The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://lists.debian.org/debian-lts-announce/2018…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3739-1/	vendor-advisoryx_refsource_UBUNTU
https://git.gnome.org/browse/libxml2/commit/?id=e…	x_refsource_MISC
https://kc.mcafee.com/corporate/index?page=conten…	x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019071…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST

Date Public

2018-04-08 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.