cnvd - cnvd-2016-01639

cnvd-2016-01639

Vulnerability from cnvd

Title: libssh2安全绕过漏洞

Description:

libssh2是一个用于实现SSH2协议的客户端C库。

libssh2中存在安全漏洞，允许远程攻击者可利用漏洞，使SSHv2 Diffie-Hellman握手使用不安全的随机参数。

Severity: 中

Patch Name: libssh2安全绕过漏洞的补丁

Patch Description:

libssh2是一个用于实现SSH2协议的客户端C库。

libssh2中存在安全漏洞，允许远程攻击者可利用漏洞，使SSHv2 Diffie-Hellman握手使用不安全的随机参数。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:

用户可参考如下厂商提供的安全补丁以修复该漏洞： https://www.libssh2.org/adv_20160223.html

Reference: https://www.libssh2.org/adv_20160223.html

Impacted products

Name
libssh2 libssh2 <= 1.6.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-0787"
    }
  },
  "description": "libssh2\u662f\u4e00\u4e2a\u7528\u4e8e\u5b9e\u73b0SSH2\u534f\u8bae\u7684\u5ba2\u6237\u7aefC\u5e93\u3002\r\n\r\nlibssh2\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\uff0c\u4f7fSSHv2 Diffie-Hellman\u63e1\u624b\u4f7f\u7528\u4e0d\u5b89\u5168\u7684\u968f\u673a\u53c2\u6570\u3002",
  "discovererName": "Andreas Schneider",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttps://www.libssh2.org/adv_20160223.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-01639",
  "openTime": "2016-03-15",
  "patchDescription": "libssh2\u662f\u4e00\u4e2a\u7528\u4e8e\u5b9e\u73b0SSH2\u534f\u8bae\u7684\u5ba2\u6237\u7aefC\u5e93\u3002\r\n\r\nlibssh2\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u5141\u8bb8\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\uff0c\u4f7fSSHv2 Diffie-Hellman\u63e1\u624b\u4f7f\u7528\u4e0d\u5b89\u5168\u7684\u968f\u673a\u53c2\u6570\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": "libssh2\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "libssh2 libssh2 \u003c= 1.6.0"
  },
  "referenceLink": "https://www.libssh2.org/adv_20160223.html",
  "serverity": "\u4e2d",
  "submitTime": "2016-03-13",
  "title": "libssh2\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2016-0787 (GCVE-0-2016-0787)

Vulnerability from cvelistv5

Published

2016-04-13 17:00

Modified

2024-08-05 22:30

Severity ?

CWE

Summary

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 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/177980.html	vendor-advisory, x_refsource_FEDORA
	https://kc.mcafee.com/corporate/index?page=content&id=SB10156	x_refsource_CONFIRM
	http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	x_refsource_CONFIRM
	https://www.libssh2.org/CVE-2016-0787.patch	x_refsource_CONFIRM
	https://www.libssh2.org/adv_20160223.html	x_refsource_CONFIRM
	https://puppet.com/security/cve/CVE-2016-0787	x_refsource_CONFIRM
	http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/201606-12	vendor-advisory, x_refsource_GENTOO
	http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html	vendor-advisory, x_refsource_SUSE
	https://bto.bluecoat.com/security-advisory/sa120	x_refsource_CONFIRM
	http://www.debian.org/security/2016/dsa-3487	vendor-advisory, x_refsource_DEBIAN
	http://www.securityfocus.com/bid/82514	vdb-entry, x_refsource_BID

Impacted products

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

Show details on NVD website

JSON

To clipboard

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}

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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