CVE-2022-31081

Published: 27 June 2022

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.

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
libhttp-daemon-perl Launchpad, Ubuntu, Debian	bionic	Released (6.01-1ubuntu0.1)
	focal	Released (6.06-1ubuntu0.1)
	impish	Ignored (reached end-of-life)
	jammy	Released (6.13-1ubuntu0.1)
	kinetic	Released (6.14-1ubuntu1)
	trusty	Released (6.01-1ubuntu0.14.04~esm1)
	upstream	Pending (6.15)
	xenial	Released (6.01-1ubuntu0.16.04~esm1)
	Patches: upstream: https://github.com/libwww-perl/HTTP-Daemon/commit/331d5c1d1f0e48e6b57ef738c2a8509b1eb53376 (bp) upstream: https://github.com/libwww-perl/HTTP-Daemon/commit/8dc5269d59e2d5d9eb1647d82c449ccd880f7fd0 upstream: https://github.com/libwww-perl/HTTP-Daemon/commit/e84475de51d6fd7b29354a997413472a99db70b2 upstream: https://github.com/libwww-perl/HTTP-Daemon/commit/faebad54455c2c2919e234202362570925fb99d1 (test)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

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