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CVE-2021-21705

Status Candidate

Overview

In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using URL validation functionality via filter_var() function with FILTER_VALIDATE_URL parameter, an URL with invalid password field can be accepted as valid. This can lead to the code incorrectly parsing the URL and potentially leading to other security implications - like contacting a wrong server or making a wrong access decision.

Related Files

Red Hat Security Advisory 2021-2992-01
Posted Aug 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2992-01 - PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server. Issues addressed include bypass, null pointer, and server-side request forgery vulnerabilities.

tags | advisory, web, php, vulnerability
systems | linux, redhat
advisories | CVE-2020-7068, CVE-2020-7069, CVE-2020-7070, CVE-2020-7071, CVE-2021-21702, CVE-2021-21705
MD5 | 0321756619f042ba1c91635b25b8fce2
Ubuntu Security Notice USN-5006-2
Posted Jul 14, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5006-2 - USN-5006-1 fixed several vulnerabilities in PHP. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that PHP incorrectly handled certain PHAR files. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service, or possibly obtain sensitive information. Various other issues were also addressed.

tags | advisory, remote, denial of service, php, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704, CVE-2021-21705
MD5 | 66293c19cf8113112211326af4be7f4c
Ubuntu Security Notice USN-5006-1
Posted Jul 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5006-1 - It was discovered that PHP incorrectly handled certain PHAR files. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. It was discovered that PHP incorrectly handled parsing URLs with passwords. A remote attacker could possibly use this issue to cause PHP to mis-parse the URL and produce wrong data. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. Various other issues were also addressed.

tags | advisory, remote, denial of service, php
systems | linux, ubuntu
advisories | CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704, CVE-2021-21705
MD5 | d2eaebcf41b9edfd36340798eb2ac873
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