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Not in CISA KEV
HIGH severity

Zendframework Remote Address Spoofing Vector in `Zend\Http\PhpEnvironment\RemoteAddress`GHSA-xffp-6w68-4775

HIGHFix: zendframework/zendframework@bb67844

GHSA-xffp-6w68-4775 is a high-severity (CVSS 7.5) vulnerability in zendframework/zendframework. A fix is available for zendframework/zendframework — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Dec 4, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘zendframework/zendframework

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

The Zend\Http\PhpEnvironment\RemoteAddress class provides features around detecting the internet protocol (IP) address for an incoming proxied request via the X-Forwarded-For header, taking into account a provided list of trusted proxy server IPs. Prior to 2.2.5, the class was not taking into account whether or not the IP address contained in PHP's $_SERVER['REMOTE_ADDR'] was in the trusted proxy server list.

The IETF draft specification indicates that if $_SERVER['REMOTE_ADDR'] is not a trusted proxy, it must be considered the originating IP address, and the value of X-Forwarded-For must be disregarded.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistzendframework/zendframework≥ 2.2.0&&< 2.2.52.2.5composer require zendframework/zendframework:^2.2.5

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zendframework/zendframework, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update zendframework/zendframework to 2.2.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xffp-6w68-4775 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

The `Zend\Http\PhpEnvironment\RemoteAddress` class provides features around detecting the internet protocol (IP) address for an incoming proxied request via the X-Forwarded-For header, taking into account a provided list of trusted proxy server IPs. Prior to 2.2.5, the class was not taking into account whether or not the IP address contained in PHP's `$_SERVER['REMOTE_ADDR']` was in the trusted proxy server list. The IETF draft specification indicates that if `$_SERVER['REMOTE_ADDR']` is not a trusted proxy, it must be considered the originating IP address, and the value of X-Forwarded-For mu
O3 Security · Impact-Aware SCA

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