CVE-2022-31081: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in HTTP::Daemon
First published: Mon Jun 27 2022(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| http\ \ | <6.15 | |
| Debian Linux | =10.0 |
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Reference Links
- http://metacpan.org/release/HTTP-Daemon/
- https://cwe.mitre.org/data/definitions/444.html
- https://datatracker.ietf.org/doc/html/rfc7230#section-9.5
- https://github.com/libwww-perl/HTTP-Daemon/commit/8dc5269d59e2d5d9eb1647d82c449ccd880f7fd0
- https://github.com/libwww-perl/HTTP-Daemon/commit/e84475de51d6fd7b29354a997413472a99db70b2
- https://github.com/libwww-perl/HTTP-Daemon/security/advisories/GHSA-cg8c-pxmv-w7cf
- https://lists.debian.org/debian-lts-announce/2022/09/msg00038.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7U4XEPZ5Q3LNOQF3E6EXFWVSEXU5IZ6T/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ECJ4ZPBQWD3B2CD6RRIVMENB5KUOJ3LC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XQBW2D43TDNYX4R2YBTNNZDBNZ45DINN/
- https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U4XEPZ5Q3LNOQF3E6EXFWVSEXU5IZ6T/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQBW2D43TDNYX4R2YBTNNZDBNZ45DINN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECJ4ZPBQWD3B2CD6RRIVMENB5KUOJ3LC/
Frequently Asked Questions
What is the severity of CVE-2022-31081?
CVE-2022-31081 has a severity rating that indicates it could potentially allow unauthorized privileged access.
How do I fix CVE-2022-31081?
To fix CVE-2022-31081, update HTTP::Daemon to version 6.15 or later.
What are the potential impacts of exploiting CVE-2022-31081?
Exploiting CVE-2022-31081 may lead to gaining privileged access to APIs or poisoning intermediate caches.
Which versions of HTTP::Daemon are affected by CVE-2022-31081?
CVE-2022-31081 affects all versions of HTTP::Daemon prior to 6.15.
Is CVE-2022-31081 present in Debian Linux 10.0?
Yes, CVE-2022-31081 can be present in Debian Linux 10.0 if it is running an affected version of HTTP::Daemon.
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