Vulnerability-Lookup

CNVD-2016-06210

Vulnerability from cnvd - Published: 2016-08-10

Title

OpenSSH sshd拒绝服务漏洞（CNVD-2016-06210）

Description

OpenSSH（OpenBSD Secure Shell）是OpenBSD计划组所维护的一套用于安全访问远程计算机的连接工具。该工具是SSH协议的开源实现，支持对所有的传输进行加密，可有效阻止窃听、连接劫持以及其他网络级的攻击。sshd是其中的一个独立守护进程。 OpenSSH 7.3之前的版本中的sshd中的auth-passwd.c文件中的‘auth_password’函数存在安全漏洞，该漏洞源于程序未能在密码验证中限制密码长度。远程攻击者可借助长的字符串利用该漏洞造成拒绝服务(CPU消耗)。

Severity

高

Patch Name

OpenSSH sshd拒绝服务漏洞（CNVD-2016-06210）的补丁

Patch Description

Formal description

目前厂商已经发布了升级补丁以修复此安全问题，补丁获取链接： https://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97

Reference

http://openwall.com/lists/oss-security/2016/08/01/2

Impacted products

Name
Openssh OpenSSH <7.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-6515"
    }
  },
  "description": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002sshd\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u72ec\u7acb\u5b88\u62a4\u8fdb\u7a0b\u3002\r\n\r\nOpenSSH 7.3\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7684sshd\u4e2d\u7684auth-passwd.c\u6587\u4ef6\u4e2d\u7684\u2018auth_password\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5728\u5bc6\u7801\u9a8c\u8bc1\u4e2d\u9650\u5236\u5bc6\u7801\u957f\u5ea6\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u957f\u7684\u5b57\u7b26\u4e32\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1(CPU\u6d88\u8017)\u3002",
  "discovererName": "Damien Miller",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/openssh/openssh-portable/commit/fcd135c9df440bcd2d5870405ad3311743d78d97",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-06210",
  "openTime": "2016-08-10",
  "patchDescription": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002sshd\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u72ec\u7acb\u5b88\u62a4\u8fdb\u7a0b\u3002\r\n\r\nOpenSSH 7.3\u4e4b\u524d\u7684\u7248\u672c\u4e2d\u7684sshd\u4e2d\u7684auth-passwd.c\u6587\u4ef6\u4e2d\u7684\u2018auth_password\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u5728\u5bc6\u7801\u9a8c\u8bc1\u4e2d\u9650\u5236\u5bc6\u7801\u957f\u5ea6\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u501f\u52a9\u957f\u7684\u5b57\u7b26\u4e32\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1(CPU\u6d88\u8017)\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": "OpenSSH sshd\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2016-06210\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Openssh OpenSSH  \u003c7.3"
  },
  "referenceLink": "http://openwall.com/lists/oss-security/2016/08/01/2",
  "serverity": "\u9ad8",
  "submitTime": "2016-08-09",
  "title": "OpenSSH sshd\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2016-06210\uff09"
}

CVE-2016-6515 (GCVE-0-2016-6515)

Vulnerability from cvelistv5 – Published: 2016-08-07 00:00 – Updated: 2024-08-06 01:29

Summary

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

15 references

URL	Tags
https://support.hpe.com/hpsc/doc/public/display?d…
https://security.netapp.com/advisory/ntap-2017113…
https://github.com/openssh/openssh-portable/commi…
http://packetstormsecurity.com/files/140070/OpenS…
https://www.exploit-db.com/exploits/40888/	exploit
http://www.securityfocus.com/bid/92212	vdb-entry
https://security.FreeBSD.org/advisories/FreeBSD-S…	vendor-advisory
http://www.oracle.com/technetwork/security-adviso…
http://www.securitytracker.com/id/1036487	vdb-entry
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://access.redhat.com/errata/RHSA-2017:2029	vendor-advisory
https://lists.debian.org/debian-lts-announce/2018…	mailing-list
http://openwall.com/lists/oss-security/2016/08/01/2	mailing-list
https://cert-portal.siemens.com/productcert/pdf/s…
https://cert-portal.siemens.com/productcert/pdf/s…

Date Public

2016-08-01 00:00

Show details on NVD website

JSON

To clipboard

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            "url": "https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html"
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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.