低危 Exim 至 4.93 SPA Authenticator auths/spa.c 越界读取漏洞
CVE编号
CVE-2020-12783利用情况
暂无补丁情况
官方补丁披露时间
2020-05-12漏洞描述
Exim是一个运行于Unix系统中的开源消息传送代理（MTA），它主要负责邮件的路由、转发和投递。<br /> Exim 4.93及之前版本中的SPA authenticator存在越界读取漏洞。该漏洞源于程序未在默认情况下启用spa身份验证驱动程序。攻击者可利用该漏洞在auths/spa.c 和 auths/auth-spa.c.中绕过SPA/NTLM身份验证。<br /> 解决建议
目前厂商已发布升级补丁以修复漏洞，补丁获取链接：https://git.exim.org/exim.git/commit/a04174dc2a84ae1008c23b6a7109e7fa3fb7b8b0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 | exim | exim | * | Up to (including) 4.93 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.11 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.12 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | exim | * | Up to (excluding) 4.93-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_AMI | exim | * | Up to (excluding) 4.92-1.26.amzn1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | exim4 | * | Up to (excluding) 4.92-8+deb10u4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | exim4 | * | Up to (excluding) 4.93-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | exim4 | * | Up to (excluding) 4.93-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_8 | exim4 | * | Up to (excluding) 4.84.2-2+deb8u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | exim4 | * | Up to (excluding) 4.89-2+deb9u7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | exim4 | * | Up to (excluding) 4.93-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_31 | exim-greylist | * | Up to (excluding) 4.93-8.fc31 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_32 | exim-greylist | * | Up to (excluding) 4.93-8.fc32 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_6 | exim-greylist | * | Up to (excluding) 4.92.3-2.el6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_7 | exim-greylist | * | Up to (excluding) 4.93-3.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_8 | exim-greylist | * | Up to (excluding) 4.93-3.el8 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | eximon | * | Up to (excluding) 4.94.2-lp152.8.3.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04 | exim4 | * | Up to (excluding) 4.86.2-2ubuntu2.6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04.7_lts | exim4 | * | Up to (excluding) 4.86.2-2ubuntu2.6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | exim4 | * | Up to (excluding) 4.90.1-1ubuntu1.5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | exim4 | * | Up to (excluding) 4.90.1-1ubuntu1.5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | exim4 | * | Up to (excluding) 4.93-13ubuntu1.1 | |||||
- 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
| CWE-ID | 漏洞类型 |
| CWE-125 | 跨界内存读 |
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