cnvd-2018-21199
Vulnerability from cnvd
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'] |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2018-10933"
}
},
"description": "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",
"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"
]
},
"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"
}
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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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