Improper input validation in Apache HTTP Server
CVE-2015-3183
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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.745 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.733 · newest: 0.745 · change: +0.012
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- marc.info/ (vendor-advisory, Mailing List, VDB Entry, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2016-2056.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-updates/2015-10/msg00011.html (vendor-advisory, Third Party Advisory)
- httpd.apache.org/security/vulnerabilities_24.html (Vendor Advisory)
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html (Patch)
- rhn.redhat.com/errata/RHSA-2016-0061.html (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html (VDB Entry, Third Party Advisory)
- security.gentoo.org/glsa/201610-02 (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html (Patch, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2015-1667.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2015-3183?
- CVE-2015-3183 is a vulnerability in Apache HTTP Server, classified under CWE-17. Published 2015-07-20.
- Is CVE-2015-3183 known to be exploited?
- 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.