Memory leak in ssl_engine_io.c for mod_ssl in Apache 2 before 2.0.49 allows remote…
Priority LOW 36Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Memory leak in ssl_engine_io.c for mod_ssl in Apache 2 before 2.0.49 allows remote attackers to cause a denial of service (memory consumption) via plain HTTP requests to the SSL port of an SSL-enabled server.
Why it matters now
EPSS 0.11008 95th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:* | 2.0.35 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:* | 2.0.36 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:* | 2.0.37 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:* | 2.0.38 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:* | 2.0.39 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:* | 2.0.40 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:* | 2.0.41 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:* | 2.0.42 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.43:*:*:*:*:*:*:* | 2.0.43 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.44:*:*:*:*:*:*:* | 2.0.44 | Vulnerable | Apache |
- cpe:2.3:a:apache:http_server:2.0.35:*:*:*:*:*:*:* Versions 2.0.35 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.36:*:*:*:*:*:*:* Versions 2.0.36 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.37:*:*:*:*:*:*:* Versions 2.0.37 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.38:*:*:*:*:*:*:* Versions 2.0.38 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.39:*:*:*:*:*:*:* Versions 2.0.39 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.40:*:*:*:*:*:*:* Versions 2.0.40 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.41:*:*:*:*:*:*:* Versions 2.0.41 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.42:*:*:*:*:*:*:* Versions 2.0.42 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.43:*:*:*:*:*:*:* Versions 2.0.43 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.44:*:*:*:*:*:*:* Versions 2.0.44 Vulnerable ·Apache
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:2.0.45:*:*:*:*:*:*:* | 2.0.45 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.46:*:*:*:*:*:*:* | 2.0.46 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.47:*:*:*:*:*:*:* | 2.0.47 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.0.48:*:*:*:*:*:*:* | 2.0.48 | Vulnerable | Apache |
- cpe:2.3:a:apache:http_server:2.0.45:*:*:*:*:*:*:* Versions 2.0.45 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.46:*:*:*:*:*:*:* Versions 2.0.46 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.47:*:*:*:*:*:*:* Versions 2.0.47 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.0.48:*:*:*:*:*:*:* Versions 2.0.48 Vulnerable ·Apache
Remediation
Red Hat 1 advisory
- RHSA-2004:084 Released 2004-03-23 · Red Hat rating Importanthttpd security update
- Red Hat Desktop version 3 httpd-2.0.46-32.ent, httpd-2.0.46-32.ent.i386, httpd-devel-2.0.46-32.ent +3
- Red Hat Enterprise Linux AS version 3 httpd-2.0.46-32.ent, httpd-2.0.46-32.ent.i386, httpd-2.0.46-32.ent.ia64 +9
- Red Hat Enterprise Linux ES version 3 httpd-2.0.46-32.ent, httpd-2.0.46-32.ent.i386, httpd-2.0.46-32.ent.ia64 +6
- Red Hat Enterprise Linux WS version 3 httpd-2.0.46-32.ent, httpd-2.0.46-32.ent.i386, httpd-2.0.46-32.ent.ia64 +6
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Desktop version 3 | Fixed | RHSA-2004:084 |
| Red Hat Enterprise Linux AS version 3 | Fixed | RHSA-2004:084 |
| Red Hat Enterprise Linux ES version 3 | Fixed | RHSA-2004:084 |
| Red Hat Enterprise Linux WS version 3 | Fixed | RHSA-2004:084 |
| Red Hat Linux 9 | Fixed | RHSA-2004:182 |
Timeline
- 2026-10-02 Threatist record created from CVE-2004-0113
- 2026-10-03 Alias added: GHSA-hq2q-rqpw-7wx5
References
Advisory 9
Other 18
- 20040325 LNSA-#2004-0006: bug workaround for Apache 2.0.48
- oval:org.mitre.oval:def:876
- http://issues.apache.org/bugzilla/show_bug.cgi?id=27106
- 4182
- [apache-cvs] 20040307 cvs commit: httpd-2.0/modules/ssl ssl_engine_io.c
- [httpd-cvs] 20190815 svn commit: r1048742 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20190815 svn commit: r1048743 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20200401 svn commit: r1058586 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20200401 svn commit: r1058587 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1073139 [2/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1888194 [2/13] - /httpd/site/trunk/content/security/json/
- [httpd-cvs] 20210330 svn commit: r1073140 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/
- [httpd-cvs] 20210330 svn commit: r1073149 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210603 svn commit: r1075360 [1/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210606 svn commit: r1075470 [2/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
More Apache Http Server vulnerabilities
- TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
- TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
- TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
- TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2004-0113 · CVE Program
- CVE-2004-0113 · NVD
- FIRST EPSS
- GHSA-hq2q-rqpw-7wx5 · GitHub Advisory Database · CC BY 4.0
- CVE-2004-0113 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences