中危 asterisk certified_asterisk 空指针解引用
CVE编号
CVE-2021-46837利用情况
暂无补丁情况
官方补丁披露时间
2022-08-30漏洞描述
res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| https://downloads.asterisk.org/pub/security/AST-2021-006.html | |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html | |
| https://www.debian.org/security/2022/dsa-5285 |
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 | asterisk | certified_asterisk | 16.8.0 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | digium | asterisk | * | From (including) 16.0.0 | Up to (excluding) 16.16.2 | ||||
| 运行在以下环境 | |||||||||
| 应用 | digium | asterisk | * | From (including) 17.0.0 | Up to (excluding) 17.9.3 | ||||
| 运行在以下环境 | |||||||||
| 应用 | digium | asterisk | * | From (including) 18.0.0 | Up to (excluding) 18.2.2 | ||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | asterisk | * | Up to (excluding) 1:16.28.0~dfsg-0+deb10u1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | asterisk | * | Up to (excluding) 1:16.28.0~dfsg-0+deb11u1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | asterisk | * | Up to (excluding) 1:18.9.0~dfsg+~cs6.10.40431411-1 | |||||
- 攻击路径 本地
- 攻击复杂度 复杂
- 权限要求 普通权限
- 影响范围 越权影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 数据泄露
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-476 | 空指针解引用 |
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