CVE编号
CVE-2016-8858利用情况
暂无补丁情况
官方补丁披露时间
2016-12-10漏洞描述
OpenSSH（OpenBSD Secure Shell）是OpenBSD计划组所维护的一套用于安全访问远程计算机的连接工具。OpenSSH在秘钥交换过程中kex_input_kexinit()函数存在内存耗尽问题，未经认证的客户端可通过重复KEXINIT过程，使服务器上每个连接的内存分配增加至384MB。攻击者利用该漏洞可发起多个连接，使服务器的内存耗尽，造成拒绝服务攻击。
解决建议
目厂商提供了源代码的修复，建议用户对源代码进行升级和编译。代码修复链接如下：http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c#rev1.127
参考链接 |
|
|---|---|
| http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126&... | |
| http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127&cont... | |
| http://www.openwall.com/lists/oss-security/2016/10/19/3 | |
| http://www.openwall.com/lists/oss-security/2016/10/20/1 | |
| http://www.securityfocus.com/bid/93776 | |
| http://www.securitytracker.com/id/1037057 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1384860 | |
| https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig | |
| https://github.com/dag-erling/kexkill/issues/1 | |
| https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c... | |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.asc | |
| https://security.gentoo.org/glsa/201612-18 | |
| https://security.netapp.com/advisory/ntap-20180201-0001/ |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 6.8 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 6.9 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 7.0 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 7.1 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 7.2 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | openbsd | openssh | 7.3 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.1 | openssh | * |
Up to (excluding) 6.6p1-17.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.1 | openssh-askpass-gnome | * |
Up to (excluding) 6.6p1-17.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.1 | openssh-helpers | * |
Up to (excluding) 6.6p1-17.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.2 | openssh | * |
Up to (excluding) 7.2p2-9.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.2 | openssh-askpass-gnome | * |
Up to (excluding) 7.2p2-9.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_42.2 | openssh-helpers | * |
Up to (excluding) 7.2p2-9.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_11_SP4 | openssh | * |
Up to (excluding) 6.6p1-35.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_11_SP4 | openssh-askpass-gnome | * |
Up to (excluding) 6.6p1-35.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_11_SP4 | openssh-helpers | * |
Up to (excluding) 6.6p1-35.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP1 | openssh | * |
Up to (excluding) 54.7.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP1 | openssh-askpass-gnome | * |
Up to (excluding) 54.7.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP1 | openssh-helpers | * |
Up to (excluding) 54.7.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP2 | openssh | * |
Up to (excluding) 7.2p2-66.3 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP2 | openssh-askpass-gnome | * |
Up to (excluding) 7.2p2-66.3 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP2 | openssh-helpers | * |
Up to (excluding) 7.2p2-66.3 |
|||||
- 攻击路径 远程
- 攻击复杂度 复杂
- 权限要求 无需权限
- 影响范围 有限影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 100
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