Vulnerability-Lookup

CNVD-2019-06788

Vulnerability from cnvd - Published: 2019-03-11

Title

LibSass拒绝服务漏洞（CNVD-2019-06788）

Description

LibSass是一个开源的使用C语言编写的Sass（CSS扩展语言）解析器。 LibSass 3.5.5之前版本中的eval.cpp文件的‘Sass::Eval::operator()’函数存在安全漏洞，该漏洞源于程序未能正确的解析‘%’字符。攻击者可借助特制的sass文件利用该漏洞造成拒绝服务（栈损坏）。

Severity

中

Patch Name

LibSass拒绝服务漏洞（CNVD-2019-06788）的补丁

Patch Description

Formal description

厂商已发布漏洞修复程序，请及时关注更新： https://github.com/sass/libsass/commit/210fdff7a65370c2ae24e022a2b35da8c423cc5f

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-19837

Impacted products

Name
LibSass LibSass <3.5.5

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-19837"
    }
  },
  "description": "LibSass\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684Sass\uff08CSS\u6269\u5c55\u8bed\u8a00\uff09\u89e3\u6790\u5668\u3002\n\nLibSass 3.5.5\u4e4b\u524d\u7248\u672c\u4e2d\u7684eval.cpp\u6587\u4ef6\u7684\u2018Sass::Eval::operator()\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u7684\u89e3\u6790\u2018%\u2019\u5b57\u7b26\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684sass\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u6808\u635f\u574f\uff09\u3002",
  "discovererName": "unKnow",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/sass/libsass/commit/210fdff7a65370c2ae24e022a2b35da8c423cc5f",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2019-06788",
  "openTime": "2019-03-11",
  "patchDescription": "LibSass\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684Sass\uff08CSS\u6269\u5c55\u8bed\u8a00\uff09\u89e3\u6790\u5668\u3002\r\n\r\nLibSass 3.5.5\u4e4b\u524d\u7248\u672c\u4e2d\u7684eval.cpp\u6587\u4ef6\u7684\u2018Sass::Eval::operator()\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u7684\u89e3\u6790\u2018%\u2019\u5b57\u7b26\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684sass\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u6808\u635f\u574f\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": "LibSass\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2019-06788\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "LibSass LibSass \u003c3.5.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-19837",
  "serverity": "\u4e2d",
  "submitTime": "2018-12-04",
  "title": "LibSass\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2019-06788\uff09"
}

CVE-2018-19837 (GCVE-0-2018-19837)

Vulnerability from cvelistv5 – Published: 2018-12-04 09:00 – Updated: 2024-08-05 11:44

Summary

In LibSass prior to 3.5.5, Sass::Eval::operator()(Sass::Binary_Expression*) inside eval.cpp allows attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, because of certain incorrect parsing of '%' as a modulo operator in parser.cpp.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://github.com/sass/libsass/issues/2659	x_refsource_MISC
https://github.com/sass/libsass/commit/210fdff7a6…	x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Date Public

2018-12-03 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.