中危 tlslite-ng_project tlslite-ng 不充分的加密强度
CVE编号
CVE-2020-26263利用情况
暂无补丁情况
官方补丁披露时间
2020-12-22漏洞描述
tlslite-ng is an open source python library that implements SSL and TLS cryptographic protocols. In tlslite-ng before versions 0.7.6 and 0.8.0-alpha39, the code that performs decryption and padding check in RSA PKCS#1 v1.5 decryption is data dependant. In particular, the code has multiple ways in which it leaks information about the decrypted ciphertext. It aborts as soon as the plaintext doesn't start with 0x00, 0x02. All TLS servers that enable RSA key exchange as well as applications that use the RSA decryption API directly are vulnerable. This is patched in versions 0.7.6 and 0.8.0-alpha39. Note: the patches depend on Python processing the individual bytes in side-channel free manner, this is known to not the case (see reference). As such, users that require side-channel resistance are recommended to use different TLS implementations, as stated in the security policy of tlslite-ng.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。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 | tlslite-ng_project | tlslite-ng | * | Up to (excluding) 0.7.6 | |||||
| 运行在以下环境 | |||||||||
| 应用 | tlslite-ng_project | tlslite-ng | 0.8.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | tlslite-ng | * | Up to (including) 0.7.5-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | tlslite-ng | * | Up to (including) 0.6.0-1+deb9u1 | |||||
- 攻击路径 远程
- 攻击复杂度 困难
- 权限要求 无需权限
- 影响范围 全局影响
- 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 传输被破坏
- 服务器危害 无影响
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-326 | 不充分的加密强度 |
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