HTTP::Daemon up to 6.14 on Perl request smuggling

Summaryinfo

A vulnerability classified as critical has been found in HTTP::Daemon up to 6.14 on Perl. Impacted is an unknown function. Performing a manipulation results in request smuggling. This vulnerability is known as CVE-2022-31081. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in HTTP::Daemon up to 6.14 on Perl. This affects some unknown processing. The manipulation with an unknown input leads to a request smuggling vulnerability. CWE is classifying the issue as CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

HTTP::Daemon is a simple http server class written in perl. Versions prior to 6.15 are subject to a vulnerability which could potentially be exploited to gain privileged access to APIs or poison intermediate caches. It is uncertain how large the risks are, most Perl based applications are served on top of Nginx or Apache, not on the `HTTP::Daemon`. This library is commonly used for local development and tests. Users are advised to update to resolve this issue. Users unable to upgrade may add additional request handling logic as a mitigation. After calling `my $rqst = $conn->get_request()` one could inspect the returned `HTTP::Request` object. Querying the 'Content-Length' (`my $cl = $rqst->header('Content-Length')`) will show any abnormalities that should be dealt with by a `400` response. Expected strings of 'Content-Length' SHOULD consist of either a single non-negative integer, or, a comma separated repetition of that number. (that is `42` or `42, 42, 42`). Anything else MUST be rejected.

The weakness was published 06/28/2022 as GHSA-cg8c-pxmv-w7cf. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2022-31081 since 05/18/2022. Neither technical details nor an exploit are publicly available.

Upgrading to version 6.15 eliminates this vulnerability. Applying the patch 8dc5269d59e2d5d9eb1647d82c449ccd880f7fd0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• HTTP::Daemon

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14

License

• open-source

CPE 2.3info

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CPE 2.2info

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