cnvd - cnvd-2016-02001

cnvd-2016-02001

Vulnerability from cnvd

Title: libssh类型混淆漏洞

Description:

libssh是一个用于访问SSH服务的C语言开发包，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。

libssh 0.7.3之前版本中存在类型混淆漏洞，该漏洞源于程序生成diffie-hellman算法的临时密钥时存在类型混淆错误。攻击者可利用该漏洞通过实施中间人攻击泄露并操纵SSH会话通信。

Severity: 中

Patch Name: libssh类型混淆漏洞的补丁

Patch Description:

libssh是一个用于访问SSH服务的C语言开发包，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。

libssh 0.7.3之前版本中存在类型混淆漏洞，该漏洞源于程序生成diffie-hellman算法的临时密钥时存在类型混淆错误。攻击者可利用该漏洞通过实施中间人攻击泄露并操纵SSH会话通信。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:

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://www.libssh.org/security/advisories/CVE-2016-0739.txt

Reference: https://www.libssh.org/security/advisories/CVE-2016-0739.txt http://secunia.com/advisories/69095

Impacted products

Name
libssh libssh <0.7.3

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-0739"
    }
  },
  "description": "libssh\u662f\u4e00\u4e2a\u7528\u4e8e\u8bbf\u95eeSSH\u670d\u52a1\u7684C\u8bed\u8a00\u5f00\u53d1\u5305\uff0c\u5b83\u80fd\u591f\u6267\u884c\u8fdc\u7a0b\u547d\u4ee4\u3001\u6587\u4ef6\u4f20\u8f93\uff0c\u540c\u65f6\u4e3a\u8fdc\u7a0b\u7684\u7a0b\u5e8f\u63d0\u4f9b\u5b89\u5168\u7684\u4f20\u8f93\u901a\u9053\u3002\r\n\r\nlibssh 0.7.3\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u751f\u6210diffie-hellman\u7b97\u6cd5\u7684\u4e34\u65f6\u5bc6\u94a5\u65f6\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u9519\u8bef\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u5b9e\u65bd\u4e2d\u95f4\u4eba\u653b\u51fb\u6cc4\u9732\u5e76\u64cd\u7eb5SSH\u4f1a\u8bdd\u901a\u4fe1\u3002",
  "discovererName": "Aris Adamantiadis",
  "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://www.libssh.org/security/advisories/CVE-2016-0739.txt",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-02001",
  "openTime": "2016-04-07",
  "patchDescription": "libssh\u662f\u4e00\u4e2a\u7528\u4e8e\u8bbf\u95eeSSH\u670d\u52a1\u7684C\u8bed\u8a00\u5f00\u53d1\u5305\uff0c\u5b83\u80fd\u591f\u6267\u884c\u8fdc\u7a0b\u547d\u4ee4\u3001\u6587\u4ef6\u4f20\u8f93\uff0c\u540c\u65f6\u4e3a\u8fdc\u7a0b\u7684\u7a0b\u5e8f\u63d0\u4f9b\u5b89\u5168\u7684\u4f20\u8f93\u901a\u9053\u3002\r\n\r\nlibssh 0.7.3\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u751f\u6210diffie-hellman\u7b97\u6cd5\u7684\u4e34\u65f6\u5bc6\u94a5\u65f6\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u9519\u8bef\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u5b9e\u65bd\u4e2d\u95f4\u4eba\u653b\u51fb\u6cc4\u9732\u5e76\u64cd\u7eb5SSH\u4f1a\u8bdd\u901a\u4fe1\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\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "libssh libssh \u003c0.7.3"
  },
  "referenceLink": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt\r\nhttp://secunia.com/advisories/69095",
  "serverity": "\u4e2d",
  "submitTime": "2016-04-05",
  "title": "libssh\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e"
}

CVE-2016-0739 (GCVE-0-2016-0739)

Vulnerability from cvelistv5

Published

2016-04-13 17:00

Modified

2024-08-05 22:30

Severity ?

CWE

Summary

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

References

▼	URL	Tags
	http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html	vendor-advisory, x_refsource_FEDORA
	http://www.ubuntu.com/usn/USN-2912-1	vendor-advisory, x_refsource_UBUNTU
	https://www.libssh.org/security/advisories/CVE-2016-0739.txt	x_refsource_CONFIRM
	https://puppet.com/security/cve/CVE-2016-0739	x_refsource_CONFIRM
	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/201606-12	vendor-advisory, x_refsource_GENTOO
	http://www.debian.org/security/2016/dsa-3488	vendor-advisory, x_refsource_DEBIAN
	http://rhn.redhat.com/errata/RHSA-2016-0566.html	vendor-advisory, x_refsource_REDHAT
	https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/	x_refsource_CONFIRM
	http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html	vendor-advisory, x_refsource_SUSE

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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          },
          {
            "tags": [
              "x_refsource_CONFIRM",
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            "url": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
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          },
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              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html"
          },
          {
            "name": "GLSA-201606-12",
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              "x_refsource_GENTOO",
              "x_transferred"
            ],
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          },
          {
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    "cna": {
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          "url": "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/"
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          "tags": [
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          "url": "http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html"
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  },
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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