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CVE-2019-15795— python-apt uses MD5 for validation

Quick assessment

Affected
Canonical Python-apt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

python-apt中存在加密问题漏洞，该漏洞源于程序使用MD5哈希算法来验证下载的软件包。攻击者可通过实施中间人攻击利用该漏洞安装被修改的软件包。

CVSS 4.7 · Medium EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2019-15795

Vulnerability Information
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Vulnerability Title
python-apt uses MD5 for validation
Source: CVE Program / CVE List V5
Vulnerability Description
python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py in version 1.9.0ubuntu1 and earlier. This allows a man-in-the-middle attack which could potentially be used to install altered packages and has been fixed in versions 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5
Vulnerability Title
python-apt 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
python-apt中存在加密问题漏洞，该漏洞源于程序使用MD5哈希算法来验证下载的软件包。攻击者可通过实施中间人攻击利用该漏洞安装被修改的软件包。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical Python-apt 0.8.3 ~ 0.8.3ubuntu7.5 -

II. Public POCs for CVE-2019-15795

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III. Intelligence Information for CVE-2019-15795

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Vendor Advisories for CVE-2019-15795 (2)

IV. Related Vulnerabilities

Same product: Python-apt
Same vendor: Canonical
Same weakness: CWE-327

V. Comments for CVE-2019-15795

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