Vulnerability-Lookup

CNVD-2018-21199

Vulnerability from cnvd - Published: 2018-10-18

Title

Libssh服务器端身份验证绕过漏洞

Description

libssh是一个C函数库，用来实现SSH2协议。 Libssh服务器端存在身份验证绕过漏洞，通过向服务器提供SSH2_MSG_USERAUTH_SUCCESS消息来代替服务器正常启动身份验证的SSH2_MSG_USERAUTH_REQUEST消息，攻击者可以在没有任何凭据的情况下成功进行身份验证。

Severity

高

Patch Name

Libssh服务器端身份验证绕过漏洞的补丁

Patch Description

libssh是一个C函数库，用来实现SSH2协议。 Libssh服务器端存在身份验证绕过漏洞，通过向服务器提供SSH2_MSG_USERAUTH_SUCCESS消息来代替服务器正常启动身份验证的SSH2_MSG_USERAUTH_REQUEST消息，攻击者可以在没有任何凭据的情况下成功进行身份验证。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

用户可联系供应商获得补丁信息： https://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/

Reference

https://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/

Impacted products

Name
['libssh libssh >=0.6', 'libssh libssh <0.8.4', 'libssh libssh <0.7.6']

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2018-10933"
    }
  },
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  "discovererName": "unknown",
  "formalWay": "\u7528\u6237\u53ef\u8054\u7cfb\u4f9b\u5e94\u5546\u83b7\u5f97\u8865\u4e01\u4fe1\u606f\uff1a\r\nhttps://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-21199",
  "openTime": "2018-10-18",
  "patchDescription": "libssh\u662f\u4e00\u4e2aC\u51fd\u6570\u5e93\uff0c\u7528\u6765\u5b9e\u73b0SSH2\u534f\u8bae\u3002\r\n\r\nLibssh\u670d\u52a1\u5668\u7aef\u5b58\u5728\u8eab\u4efd\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u901a\u8fc7\u5411\u670d\u52a1\u5668\u63d0\u4f9bSSH2_MSG_USERAUTH_SUCCESS\u6d88\u606f\u6765\u4ee3\u66ff\u670d\u52a1\u5668\u6b63\u5e38\u542f\u52a8\u8eab\u4efd\u9a8c\u8bc1\u7684SSH2_MSG_USERAUTH_REQUEST\u6d88\u606f\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5728\u6ca1\u6709\u4efb\u4f55\u51ed\u636e\u7684\u60c5\u51b5\u4e0b\u6210\u529f\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\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": "Libssh\u670d\u52a1\u5668\u7aef\u8eab\u4efd\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "libssh libssh \u003e=0.6",
      "libssh libssh \u003c0.8.4",
      "libssh libssh \u003c0.7.6"
    ]
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  "referenceLink": "https://www.libssh.org/2018/10/16/libssh-0-8-4-and-0-7-6-security-and-bugfix-release/",
  "serverity": "\u9ad8",
  "submitTime": "2018-10-18",
  "title": "Libssh\u670d\u52a1\u5668\u7aef\u8eab\u4efd\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2018-10933 (GCVE-0-2018-10933)

Vulnerability from cvelistv5 – Published: 2018-10-17 12:00 – Updated: 2024-08-05 07:54

Summary

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

Severity

9.1 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE

CWE-592

Assigner

redhat redhat root

References

11 references

URL	Tags
https://usn.ubuntu.com/3795-1/	vendor-advisoryx_refsource_UBUNTU
https://www.oracle.com/technetwork/security-advis…	x_refsource_CONFIRM
https://usn.ubuntu.com/3795-2/	vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2018/dsa-4322	vendor-advisoryx_refsource_DEBIAN
https://www.exploit-db.com/exploits/45638/	exploitx_refsource_EXPLOIT-DB
https://www.libssh.org/security/advisories/CVE-20…	x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/105677	vdb-entryx_refsource_BID
https://lists.debian.org/debian-lts-announce/2018…	mailing-listx_refsource_MLIST
https://psirt.global.sonicwall.com/vuln-detail/SN…	x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2019011…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
[UNKNOWN]	libssh	Affected: 0.7.6 Affected: 0.8.4

Date Public

2018-10-16 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.