cnvd-2019-07799
Vulnerability from cnvd
Title: libssh2整数溢出漏洞（CNVD-2019-07799）
Description:
libssh2是一款实现SSH2协议的客户端C库，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。
libssh2中存在整数溢出漏洞，该漏洞源于‘_libssh2_transport_read()’函数未能正确地检查来自服务器的packet_length值，远程攻击者可利用该漏洞在客户端系统上执行代码。
Severity: 高
Patch Name: libssh2整数溢出漏洞（CNVD-2019-07799）的补丁
Patch Description:
libssh2是一款实现SSH2协议的客户端C库，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。
libssh2中存在整数溢出漏洞，该漏洞源于‘_libssh2_transport_read()’函数未能正确地检查来自服务器的packet_length值，远程攻击者可利用该漏洞在客户端系统上执行代码。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:
厂商已发布了漏洞修复程序，请及时关注更新： https://www.libssh2.org/CVE-2019-3855.html
Reference: https://vigilance.fr/vulnerability/libssh2-multiple-vulnerabilities-28768
Impacted products
| Name | libssh2 libssh2 |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2019-3855"
}
},
"description": "libssh2\u662f\u4e00\u6b3e\u5b9e\u73b0SSH2\u534f\u8bae\u7684\u5ba2\u6237\u7aefC\u5e93\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\n\nlibssh2\u4e2d\u5b58\u5728\u6574\u6570\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u2018_libssh2_transport_read()\u2019\u51fd\u6570\u672a\u80fd\u6b63\u786e\u5730\u68c0\u67e5\u6765\u81ea\u670d\u52a1\u5668\u7684packet_length\u503c\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u5ba2\u6237\u7aef\u7cfb\u7edf\u4e0a\u6267\u884c\u4ee3\u7801\u3002",
"discovererName": "Chris Coulson",
"formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.libssh2.org/CVE-2019-3855.html",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2019-07799",
"openTime": "2019-03-22",
"patchDescription": "libssh2\u662f\u4e00\u6b3e\u5b9e\u73b0SSH2\u534f\u8bae\u7684\u5ba2\u6237\u7aefC\u5e93\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\nlibssh2\u4e2d\u5b58\u5728\u6574\u6570\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u2018_libssh2_transport_read()\u2019\u51fd\u6570\u672a\u80fd\u6b63\u786e\u5730\u68c0\u67e5\u6765\u81ea\u670d\u52a1\u5668\u7684packet_length\u503c\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u5ba2\u6237\u7aef\u7cfb\u7edf\u4e0a\u6267\u884c\u4ee3\u7801\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\u6574\u6570\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2019-07799\uff09\u7684\u8865\u4e01",
"products": {
"product": "libssh2 libssh2"
},
"referenceLink": "https://vigilance.fr/vulnerability/libssh2-multiple-vulnerabilities-28768",
"serverity": "\u9ad8",
"submitTime": "2019-03-20",
"title": "libssh2\u6574\u6570\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2019-07799\uff09"
}
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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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