CVE-2020-8226: phpBB Remote Image Dimensions Check SSRF Vulnerability
Summary
CVE-2020-8226: A vulnerability exists in phpBB. Affects phpbb across 2 version ranges.
< 3.2.10
>= 3.3.0, < 3.3.1
Fixed in 3.2.10 or 3.3.1, depending on the release line you run. How to fix ↓
Also tracked for
- phpbb/phpbb · Packagist
The same CVE-2020-8226 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
phpBB is an open-source forum software written in PHP. It provides a platform for users to create and manage online communities. This vulnerability affects phpBB versions prior to 3.2.10 and 3.3.1. phpBB allows remote image dimensions check, which can be exploited to perform Server-Side Request Forgery (SSRF) attacks.
Vulnerability Detail
The vulnerability in phpBB arises from the remote image dimensions check feature. Attackers can abuse this functionality to make requests to arbitrary URLs and potentially access internal resources or perform other malicious actions. This SSRF vulnerability poses a risk to the security and integrity of the affected phpBB installations.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
< 3.2.103.2.10 -
>= 3.3.0, < 3.3.13.3.1
Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →
Workaround
As a temporary workaround, it is possible to disable the remote image dimensions check feature in phpBB. This can be achieved by modifying the configuration settings or by applying a code change. However, it is important to note that disabling this feature may impact the functionality of certain forum features that rely on image dimensions.
Conclusion
The phpBB Remote Image Dimensions Check SSRF vulnerability allows attackers to abuse the remote image dimensions check feature and potentially perform unauthorized actions on the vulnerable server. It is crucial to upgrade to the patched versions or disable the feature to mitigate the risk. For further assistance and support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for phpbb →
FAQ
phpBB is an open-source forum software written in PHP. It provides a platform for users to create and manage online communities.
phpBB versions prior to 3.2.10 and 3.3.1 are affected by this vulnerability.
SSRF stands for Server-Side Request Forgery. It is a vulnerability that allows an attacker to make requests to internal or external resources on behalf of the vulnerable server.
Exploiting this vulnerability can lead to unauthorized access to internal resources, data leakage, or other malicious actions depending on the server's configuration.
To fix this vulnerability, it is recommended to upgrade phpBB to version 3.2.10 or 3.3.1. Alternatively, you can disable the remote image dimensions check feature, but this may impact certain forum functionalities.
References
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