CVE-2015-3183

medium

Published 2015-07-20 · Modified 2026-05-06

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

5.0

Description

The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`2.4.16-1`
debian	bullseye	fixed	`2.4.16-1`
debian	forky	fixed	`2.4.16-1`
debian	sid	fixed	`2.4.16-1`
debian	trixie	fixed	`2.4.16-1`

Application impact

Vendor	Product	Versions	Fixed
apache	http_server	`{"startIncluding":"2.2.0","endExcluding":"2.2.31"}`	`2.2.31`
apache	http_server	`{"startIncluding":"2.4.0","endExcluding":"2.4.16"}`	`2.4.16`

References

CWEs

CWE-17 CWE-20

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.