Vulnerability-Lookup

CNVD-2018-06438

Vulnerability from cnvd - Published: 2018-03-27

Title

zsh拒绝服务漏洞

Description

Z Shell(Zsh)是一种Unix shell，它可以用作为交互式的登录shell，也是一种强大的shell脚本命令解释器。 5.4.2及更早版本的zsh中的params.c在复制空哈希表过程中存在拒绝服务漏洞。攻击者可利用该漏洞导致zsh崩溃。

Severity

中

Patch Name

zsh拒绝服务漏洞的补丁

Patch Description

Z Shell(Zsh)是一种Unix shell，它可以用作为交互式的登录shell，也是一种强大的shell脚本命令解释器。 5.4.2及更早版本的zsh中的params.c在复制空哈希表过程中存在拒绝服务漏洞。攻击者可利用该漏洞导致zsh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

厂商已发布漏洞修复程序，请及时关注更新： https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd

Reference

https://nvd.nist.gov/vuln/detail/CVE-2018-7549

Impacted products

Name
Zsh Zsh <=5.4.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-7549"
    }
  },
  "description": "Z Shell(Zsh)\u662f\u4e00\u79cdUnix shell\uff0c\u5b83\u53ef\u4ee5\u7528\u4f5c\u4e3a\u4ea4\u4e92\u5f0f\u7684\u767b\u5f55shell\uff0c\u4e5f\u662f\u4e00\u79cd\u5f3a\u5927\u7684shell\u811a\u672c\u547d\u4ee4\u89e3\u91ca\u5668\u3002\r\n\r\n5.4.2\u53ca\u66f4\u65e9\u7248\u672c\u7684zsh\u4e2d\u7684params.c\u5728\u590d\u5236\u7a7a\u54c8\u5e0c\u8868\u8fc7\u7a0b\u4e2d\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4zsh\u5d29\u6e83\u3002",
  "discovererName": "unknown",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-06438",
  "openTime": "2018-03-27",
  "patchDescription": "Z Shell(Zsh)\u662f\u4e00\u79cdUnix shell\uff0c\u5b83\u53ef\u4ee5\u7528\u4f5c\u4e3a\u4ea4\u4e92\u5f0f\u7684\u767b\u5f55shell\uff0c\u4e5f\u662f\u4e00\u79cd\u5f3a\u5927\u7684shell\u811a\u672c\u547d\u4ee4\u89e3\u91ca\u5668\u3002\r\n\r\n5.4.2\u53ca\u66f4\u65e9\u7248\u672c\u7684zsh\u4e2d\u7684params.c\u5728\u590d\u5236\u7a7a\u54c8\u5e0c\u8868\u8fc7\u7a0b\u4e2d\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4zsh\u5d29\u6e83\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": "zsh\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Zsh Zsh \u003c=5.4.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-7549",
  "serverity": "\u4e2d",
  "submitTime": "2018-02-28",
  "title": "zsh\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2018-7549 (GCVE-0-2018-7549)

Vulnerability from cvelistv5 – Published: 2018-02-27 22:00 – Updated: 2024-08-05 06:31

Summary

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://usn.ubuntu.com/3593-1/	vendor-advisoryx_refsource_UBUNTU
https://security.gentoo.org/glsa/201805-10	vendor-advisoryx_refsource_GENTOO
https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbef…	x_refsource_MISC
https://access.redhat.com/errata/RHSA-2018:3073	vendor-advisoryx_refsource_REDHAT

Date Public

2018-02-27 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.