CVE-2009-1891 - CVE House
Back to Database
Status published High CVE-2009-1891

The mod_deflate module in Apache httpd 2.2.11 and earlier compresses...

Vulnerability Description

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).

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2009-1891

Credits & Attribution

No credits recorded in the NVD database.

References

More from apache

View All →
CVE-2025-58712
Amq: privilege escalation via excessive /etc/passwd permissions
Medium 6.4
CVE-2021-25958
Generation of Error Message Containing Sensitive Information in Apache OFBiz
Medium 6.5
CVE-2021-24117
In Apache Teaclave Rust SGX SDK 1.1.3, a side-channel vulnerability...
Medium 4.9
CVE-2020-5499
Baidu Rust SGX SDK through 1.0.8 has an enclave ID...
Critical 9.8
CVE-2018-14889
CouchDB in Vectra Networks Cognito Brain and Sensor before 4.3...
High 7.8

Affected Vendor

Affected Software

http server, debian linux, fedora, ubuntu linux, enterprise linux desktop, enterprise linux eus, enterprise linux server, enterprise linux server aus, enterprise linux workstation
Vulnerable Versions:
2.0.35, 2.2.0, 4.0, 5.0, 6.0, 11, 6.06, 8.04, 8.10, 9.04, 5.3

Timeline

Official Publish: July 10th, 2009
Last Modified: August 7th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.