Description
Stack-based buffer overflow in the ssl_util_uuencode_binary function in ssl_util.c for Apache mod_ssl, when mod_ssl is configured to trust the issuing CA, may allow remote attackers to execute arbitrary code via a client certificate with a long subject DN.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apache2 | 2.0.50-1 | — |
| Debian 13 | apache2 | 2.0.50-1 | — |
| Debian 12 | apache2 | 2.0.50-1 | — |
| Debian 3.0 | libapache-mod-ssl | 2.8.9-2.4 | DSA-532 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | httpd +1 | 2.0.46-32.ent.3 | RHSA-2004:342 |
| RHEL 3 | mod_ssl | 1:2.0.46-32.ent.3 | RHSA-2004:342 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Network Proxy 4 | jabberd | 2.0s10-3.37.rhn | RHSA-2008:0523 |
| Red Hat Network Proxy 4 | rhn-apache | 1.3.27-36.rhn.rhel3 | RHSA-2008:0523 |
| Red Hat Network Proxy 4 | rhn-modperl | 1.29-16.rhel3 | RHSA-2008:0523 |
Advisories 3
- RHSA-2008:0523 Red Hat Security Advisory: Red Hat Network Proxy Server security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2004:342 Red Hat Security Advisory: httpd security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-532 libapache-mod-ssl - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 2004-0031 vendor-advisory
- oval:org.mitre.oval:def:11458 vdb-entry signature
- MDKSA-2004:054 vendor-advisory
- RHSA-2004:342 vendor-advisory
- RHSA-2004:245 vendor-advisory
- GLSA-200406-05 vendor-advisory
- 20040527 [OpenPKG-SA-2004.026] OpenPKG Security Advisory (apache) mailing-list
- RHSA-2004:405 vendor-advisory
- SSRT4788 vendor-advisory
- RHSA-2005:816 vendor-advisory
- SSRT4777 vendor-advisory
- 20040517 mod_ssl ssl_util_uuencode_binary potential problem mailing-list
- 10355 vdb-entry
- DSA-532 vendor-advisory
- FLSA:1888 vendor-advisory
- MDKSA-2004:055 vendor-advisory
- apache-modssl-uuencode-bo(16214) vdb-entry
- 20040601 TSSA-2004-008 - apache mailing-list
- [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/vulnerabilit mailing-list
- [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/vulnerabilit mailing-list
- [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/vulnerabilit mailing-list
- [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/vulnerabilit mailing-list
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073139 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1888194 [3/13] - /httpd/site/trunk/content/security/json/ mailing-list
- [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.ht mailing-list
- [httpd-cvs] 20210330 svn commit: r1073143 [2/3] - in /websites/staging/httpd/trunk/content: ./ security/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073149 [3/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/ mailing-list
- [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/vulnerabiliti mailing-list