The mod_auth_mellon module before 0.8.1 allows remote attackers to cause a denial of service (Apache HTTP server crash) via a crafted logout
The mod_auth_mellon module before 0.8.1 allows remote attackers to cause a denial of service (Apache HTTP server crash) via a crafted logout request that triggers a read of uninitialized data.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Nov 14, 2014
- Updated
- Jun 16, 2026
- EPSS
- 3.6% · 89th percentile
- CWE
- CWE-399
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Report tools
Action score
38
Monitor
Low priority for now.
- CVSS
- 37 / 40 · 9.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.6%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| uninett | mod auth mellon | cpe:2.3:a:uninett:mod_auth_mellon |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server eus | cpe:2.3:o:redhat:enterprise_linux_server_eus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- redhat enterprise linux desktop6.0
- redhat enterprise linux server6.0
- redhat enterprise linux server aus6.6
- redhat enterprise linux server eus6.6
- redhat enterprise linux server tus6.6
- redhat enterprise linux workstation6.0
- uninett mod auth mellonbefore 0.8.1
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | libapache2-mod-auth-mellon | before 0.9.0 | 0.9.0 |
| Red Hat:enterprise_linux:6::server | mod_auth_mellon | before 0:0.8.0-3.el6_6 | 0:0.8.0-3.el6_6 |
| Red Hat:enterprise_linux:6::server | mod_auth_mellon-debuginfo | before 0:0.8.0-3.el6_6 | 0:0.8.0-3.el6_6 |
Same product
uninett: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-8566The mod_auth_mellon module before 0.8.1 allows remote attackers to obtain sensitive information or cause a denial of service (segmentation f26Monitor
- CVE-2021-3639A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly.24Monitor
- CVE-2017-6807mod_auth_mellon before 0.13.1 is vulnerable to a Cross-Site Session Transfer attack, where a user with access to one web site running on a s24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:libapache2-mod-auth-mellon | 0.9.0 · Debian:12 | Package registry (OSV) |
| red hat:mod_auth_mellon | 0:0.8.0-3.el6_6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:mod_auth_mellon-debuginfo | 0:0.8.0-3.el6_6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-399 · Resource Management ErrorsCVSS vector
AV:N/AC:L/Au:N/C:N/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- linux.oracle.com/errata/ELSA-2014-1803.html
- rhn.redhat.com/errata/RHSA-2014-1803.html
- secunia.com/advisories/62094
- secunia.com/advisories/62125
- github.com/UNINETT/mod_auth_mellon/commit/0f5b4fd860fa7e3a6c47201637aab05395f32647
- postlister.uninett.no/sympa/arc/modmellon/2014-11/msg00000.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.