RHSA-2004:119

Vulnerability from csaf_redhat - Published: 2004-03-17 12:31 - Updated: 2025-11-21 17:27
Summary
Red Hat Security Advisory: openssl security update
Severity
Important
Notes
Topic: Updated OpenSSL packages that fix a remote denial of service vulnerability are now available for Red Hat Enterprise Linux 2.1.
Details: OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. Testing performed by the OpenSSL group using the Codenomicon TLS Test Tool uncovered a bug in older versions of OpenSSL 0.9.6 prior to 0.9.6d that can lead to a denial of service attack (infinite loop). The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0081 to this issue. Testing performed by Novell using a test suite provided by NISCC uncovered an issue in the ASN.1 parser in versions of OpenSSL 0.9.6 prior to 0.9.6l which could cause large recursion and possibly lead to a denial of service attack if used where stack space is limited. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0851 to this issue. These updated packages contain patches provided by the OpenSSL group that protect against these issues. NOTE: Because server applications are affected by this issue, users are advised to either restart all services using OpenSSL functionality or restart their system after installing these updated packages.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2003-0851

OpenSSL 0.9.6k allows remote attackers to cause a denial of service (crash via large recursion) via malformed ASN.1 sequences.

Affected products
Product Identifier Version Remediation
Red Hat Enterprise Linux AS (Advanced Server) version 2.1
Red Hat / Red Hat Enterprise Linux
 cpe:/o:redhat:enterprise_linux:2.1::as —
Vendor Fix fix
Red Hat Enterprise Linux ES version 2.1
Red Hat / Red Hat Enterprise Linux
 cpe:/o:redhat:enterprise_linux:2.1::es —
Vendor Fix fix
Red Hat Enterprise Linux WS version 2.1
Red Hat / Red Hat Enterprise Linux
 cpe:/o:redhat:enterprise_linux:2.1::ws —
Vendor Fix fix
Red Hat Linux Advanced Workstation 2.1
Red Hat / Red Hat Enterprise Linux
 cpe:/o:redhat:enterprise_linux:2.1::aw —
Vendor Fix fix
Threats
Impact Important
CVE-2004-0081

OpenSSL 0.9.6 before 0.9.6d does not properly handle unknown message types, which allows remote attackers to cause a denial of service (infinite loop), as demonstrated using the Codenomicon TLS Test Tool.

Affected products
Fixed 4 products, the same list as for CVE-2003-0851
Threats
Impact Low
References
To clipboard 

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        "text": "OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and\nTransport Layer Security (TLS v1) protocols as well as a full-strength\ngeneral purpose cryptography library.\n\nTesting performed by the OpenSSL group using the Codenomicon TLS Test Tool\nuncovered a bug in older versions of OpenSSL 0.9.6 prior to 0.9.6d that can\nlead to a denial of service attack (infinite loop).  The Common\nVulnerabilities and Exposures project (cve.mitre.org) has assigned the name\nCAN-2004-0081 to this issue.\n\nTesting performed by Novell using a test suite provided by NISCC uncovered\nan issue in the ASN.1 parser in versions of OpenSSL 0.9.6 prior to 0.9.6l\nwhich could cause large recursion and possibly lead to a denial of service\nattack if used where stack space is limited.  The Common Vulnerabilities\nand Exposures project (cve.mitre.org) has assigned the name CAN-2003-0851\nto this issue.\n\nThese updated packages contain patches provided by the OpenSSL group that\nprotect against these issues.\n\nNOTE: Because server applications are affected by this issue, users are\nadvised to either restart all services using OpenSSL functionality or\nrestart their system after installing these updated packages.",
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}



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