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Vulnerability DatabaseCVE-2020-36474
CVE-2020-36474:
PHP vulnerability analysis and mitigation
Overview
SafeCurl before version 0.9.2 was identified with a DNS rebinding vulnerability (CVE-2020-36474). The vulnerability was disclosed on August 20, 2021, affecting the SafeCurl library's security mechanisms (CISA Bulletin).
Technical details
The vulnerability was assigned a CVSS v3.1 base score of 7.5, indicating a medium to high severity level. The vulnerability allowed potential DNS rebinding attacks between when the request URL is checked against the blacklist of IPs and when the curl request is executed (GitHub PR).
Impact
The vulnerability could allow attackers to bypass SafeCurl's security controls through DNS rebinding attacks, potentially leading to unauthorized access to internal resources or services that should be protected (CISA Bulletin).
Mitigation and workarounds
The vulnerability was patched in SafeCurl version 0.9.2. The fix involves implementing DNS pinning after hosts are validated, preventing DNS rebinding attacks by storing resolved domains and setting them in curl (GitHub Release).
Additional resources
Source: This report was generated using AI
Related PHP vulnerabilities:
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