Resource exhaustion in Apache HTTP Server
CVE-2009-1891
The mod_deflate module in Apache httpd 2.2.11 and earlier compresses large files until completion even after the associated network connection is closed, which allows remote attackers to cause a denial of service (CPU consumption).
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 7.1 (High). Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.171 (97.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.171 · newest: 0.171 · change: 0.000
Affected products
- Apache HTTP Server
- Canonical Ubuntu Linux — versions 6.06, 8.04, 8.10
- Debian Linux — versions 4.0, 5.0, 6.0
- Fedoraproject Fedora — versions 11
- Red Hat Enterprise Linux Desktop — versions 5.0
- Red Hat Enterprise Linux Eus — versions 5.3
- Red Hat Enterprise Linux Server — versions 5.0
- Red Hat Enterprise Linux Server Aus — versions 5.3
- Red Hat Enterprise Linux Workstation — versions 5.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- marc.info/ (mailing-list, Exploit, Mailing List, Third Party Advisory, Issue Tracking)
- www.redhat.com/archives/fedora-package-announce/2009-August/msg01363.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2009-10/msg00006.html (vendor-advisory, Mailing List, Third Party Advisory)
- wiki.rpath.com/wiki/Advisories:rPSA-2009-0142 (Broken Link)
- secunia.com/advisories/35781 (Not Applicable, Vendor Advisory, third-party-advisory)
- www-01.ibm.com/support/docview.wss (vendor-advisory, Third Party Advisory)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:12361 (signature, Third Party Advisory, vdb-entry)
- www.mandriva.com/security/advisories (vendor-advisory, Patch, Broken Link)
- www-01.ibm.com/support/docview.wss (vendor-advisory, Third Party Advisory)
- marc.info/ (vendor-advisory, Mailing List, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2009-1891?
- CVE-2009-1891 is a vulnerability in Apache HTTP Server, classified under Uncontrolled Resource Consumption. Published 2009-07-10.
- Is CVE-2009-1891 known to be exploited?
- 22 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.