Vulnerability-Lookup

CNVD-2015-05760

Vulnerability from cnvd - Published: 2015-09-01

Title

OpenSSH sshd monitor.c文件内存错误引用漏洞

Description

OpenSSH（OpenBSD Secure Shell）on non-OpenBSD platforms是OpenBSD计划组所维护的一套运行于非OpenBSD（基于BSD的UNIX实现）平台且用于安全访问远程计算机的连接工具。基于non-OpenBSD平台的OpenSSH 7.0之前版本的sshd中的monitor.c文件中的‘mm_answer_pam_free_ctx’函数存在内存错误引用漏洞。本地攻击者可通过控制sshd uid发送错误的MONITOR_REQ_PAM_FREE_CTX请求利用该漏洞获取权限。

Severity

中

Patch Name

OpenSSH sshd monitor.c文件内存错误引用漏洞的补丁

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： http://www.openssh.com/txt/release-7.0

Reference

http://www.openwall.com/lists/oss-security/2015/08/22/1 http://seclists.org/fulldisclosure/2015/Aug/54

Impacted products

Name
Openssh OpenSSH <=6.9

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-6564"
    }
  },
  "description": "OpenSSH\uff08OpenBSD Secure Shell\uff09on non-OpenBSD platforms\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u8fd0\u884c\u4e8e\u975eOpenBSD\uff08\u57fa\u4e8eBSD\u7684UNIX\u5b9e\u73b0\uff09\u5e73\u53f0\u4e14\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\r\n\r\n\u57fa\u4e8enon-OpenBSD\u5e73\u53f0\u7684OpenSSH 7.0\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684monitor.c\u6587\u4ef6\u4e2d\u7684\u2018mm_answer_pam_free_ctx\u2019\u51fd\u6570\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u63a7\u5236sshd uid\u53d1\u9001\u9519\u8bef\u7684MONITOR_REQ_PAM_FREE_CTX\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\u3002",
  "discovererName": "unknown",
  "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\nhttp://www.openssh.com/txt/release-7.0",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2015-05760",
  "openTime": "2015-09-01",
  "patchDescription": "OpenSSH\uff08OpenBSD Secure Shell\uff09on non-OpenBSD platforms\u662fOpenBSD\u8ba1\u5212\u7ec4\u6240\u7ef4\u62a4\u7684\u4e00\u5957\u8fd0\u884c\u4e8e\u975eOpenBSD\uff08\u57fa\u4e8eBSD\u7684UNIX\u5b9e\u73b0\uff09\u5e73\u53f0\u4e14\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u57fa\u4e8enon-OpenBSD\u5e73\u53f0\u7684OpenSSH 7.0\u4e4b\u524d\u7248\u672c\u7684sshd\u4e2d\u7684monitor.c\u6587\u4ef6\u4e2d\u7684\u2018mm_answer_pam_free_ctx\u2019\u51fd\u6570\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u63a7\u5236sshd uid\u53d1\u9001\u9519\u8bef\u7684MONITOR_REQ_PAM_FREE_CTX\u8bf7\u6c42\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\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 monitor.c\u6587\u4ef6\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Openssh OpenSSH  \u003c=6.9"
  },
  "referenceLink": "http://www.openwall.com/lists/oss-security/2015/08/22/1\r\nhttp://seclists.org/fulldisclosure/2015/Aug/54",
  "serverity": "\u4e2d",
  "submitTime": "2015-08-25",
  "title": "OpenSSH sshd monitor.c\u6587\u4ef6\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e"
}

CVE-2015-6564 (GCVE-0-2015-6564)

Vulnerability from cvelistv5 – Published: 2015-08-24 00:00 – Updated: 2026-05-27 16:18

Summary

Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

Severity

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 16:18 UTC

CWE

n/a
CWE-416 - Use After Free

Assigner

mitre mitre root

References

16 references

URL	Tags
http://www.openwall.com/lists/oss-security/2015/08/22/1	mailing-list
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisory
http://www.securityfocus.com/bid/76317	vdb-entry
http://www.oracle.com/technetwork/topics/security…
https://security.gentoo.org/glsa/201512-04	vendor-advisory
https://kc.mcafee.com/corporate/index?page=conten…
http://www.openssh.com/txt/release-7.0
http://www.oracle.com/technetwork/topics/security…
https://github.com/openssh/openssh-portable/commi…
http://rhn.redhat.com/errata/RHSA-2016-0741.html	vendor-advisory
http://seclists.org/fulldisclosure/2015/Aug/54	mailing-list
http://www.oracle.com/technetwork/topics/security…
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
https://lists.debian.org/debian-lts-announce/2018…	mailing-list
https://www.broadcom.com/support/fibre-channel-ne…
https://cert-portal.siemens.com/productcert/pdf/s…

Date Public

2015-08-01 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.

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Action not permitted

CNVD-2015-05760

CVE-2015-6564 (GCVE-0-2015-6564)

Tags

Sightings

Nomenclature

Related by attack behaviour