CVE-2021-32552— apport read_file() function could follow maliciously constructed symbolic links
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I. Basic Information for CVE-2021-32552
Vulnerability Information
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Vulnerability Title
apport read_file() function could follow maliciously constructed symbolic links
Source: NVD (National Vulnerability Database)
Vulnerability Description
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-16 package apport hooks, it could expose private data to other local users.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Ubuntu Apport 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apport是一款用于收集并反馈错误信息（当应用程序崩溃时操作系统认为有用的信息）的工具包。 Ubuntu Apport 中存在安全漏洞，该漏洞源于错误地处理了某些信息收集操作，攻击者可利用该漏洞可以使用这些问题作为管理员读写任意文件。以下产品及版本受到影响：Ubuntu 14.04 ESM、Ubuntu 16.04 ESM。
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
II. Public POCs for CVE-2021-32552
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- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-32552
Same Patch Batch · Canonical · 2021-06-12 · 11 CVEs total
| CVE-2021-32555 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32553 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32554 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32550 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32551 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32549 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32548 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32547 | 7.3 HIGH | apport read_file() function could follow maliciously constructed symbolic links |
| CVE-2021-32557 | 5.2 MEDIUM | apport process_report() arbitrary file write |
| CVE-2021-32556 | 3.8 LOW | apport get_modified_conffiles() function command injection |
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V. Comments for CVE-2021-32552
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