Security update for c3p0 and mchange-commons SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2026:0855-1 Final 1 1 2026-03-10T05:06:36Z current 2026-03-10T05:06:36Z 2026-03-10T05:06:36Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for c3p0 and mchange-commons This update for c3p0 and mchange-commons fixes the following issues: c3p0: - Security issues fixed: - CVE-2026-27830: Fixed unsafe object deserialization (bsc#1258942) - Fix the null pointer exception in the userOverridesAsString method (bsc#1259313). mchange-commons: - Security issues fixed: - CVE-2026-27727: Disabled remote ClassLoading when dereferencing javax.naming.Reference instances (bsc#1258913) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2026-855,openSUSE-SLE-15.6-2026-855 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2026/suse-su-20260855-1/ Link for SUSE-SU-2026:0855-1 https://lists.suse.com/pipermail/sle-security-updates/2026-March/024666.html E-Mail link for SUSE-SU-2026:0855-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1258913 SUSE Bug 1258913 https://bugzilla.suse.com/1258942 SUSE Bug 1258942 https://bugzilla.suse.com/1259313 SUSE Bug 1259313 https://www.suse.com/security/cve/CVE-2026-27727/ SUSE CVE CVE-2026-27727 page https://www.suse.com/security/cve/CVE-2026-27830/ SUSE CVE CVE-2026-27830 page openSUSE Leap 15.6 c3p0-0.9.5.5-150400.3.5.1 c3p0-javadoc-0.9.5.5-150400.3.5.1 mchange-commons-0.2.20-150400.3.3.1 mchange-commons-javadoc-0.2.20-150400.3.3.1 c3p0-0.9.5.5-150400.3.5.1 as a component of openSUSE Leap 15.6 c3p0-javadoc-0.9.5.5-150400.3.5.1 as a component of openSUSE Leap 15.6 mchange-commons-0.2.20-150400.3.3.1 as a component of openSUSE Leap 15.6 mchange-commons-javadoc-0.2.20-150400.3.3.1 as a component of openSUSE Leap 15.6 mchange-commons-java, a library that provides Java utilities, includes code that mirrors early implementations of JNDI functionality, including support for remote `factoryClassLocation` values, by which code can be downloaded and invoked within a running application. If an attacker can provoke an application to read a maliciously crafted `jaxax.naming.Reference` or serialized object, they can provoke the download and execution of malicious code. Implementations of this functionality within the JDK were disabled by default behind a System property that defaults to `false`, `com.sun.jndi.ldap.object.trustURLCodebase`. However, since mchange-commons-java includes an independent implementation of JNDI derefencing, libraries (such as c3p0) that resolve references via that implementation could be provoked to download and execute malicious code even after the JDK was hardened. Mirroring the JDK patch, mchange-commons-java's JNDI functionality is gated by configuration parameters that default to restrictive values starting in version 0.4.0. No known workarounds are available. Versions prior to 0.4.0 should be avoided on application CLASSPATHs. CVE-2026-27727 openSUSE Leap 15.6:c3p0-0.9.5.5-150400.3.5.1 openSUSE Leap 15.6:c3p0-javadoc-0.9.5.5-150400.3.5.1 openSUSE Leap 15.6:mchange-commons-0.2.20-150400.3.3.1 openSUSE Leap 15.6:mchange-commons-javadoc-0.2.20-150400.3.3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2026/suse-su-20260855-1/ https://www.suse.com/security/cve/CVE-2026-27727.html CVE-2026-27727 https://bugzilla.suse.com/1258913 SUSE Bug 1258913 c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map<String,Map<String,String>>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects "indirectly serialized" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0. CVE-2026-27830 openSUSE Leap 15.6:c3p0-0.9.5.5-150400.3.5.1 openSUSE Leap 15.6:c3p0-javadoc-0.9.5.5-150400.3.5.1 openSUSE Leap 15.6:mchange-commons-0.2.20-150400.3.3.1 openSUSE Leap 15.6:mchange-commons-javadoc-0.2.20-150400.3.3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2026/suse-su-20260855-1/ https://www.suse.com/security/cve/CVE-2026-27830.html CVE-2026-27830 https://bugzilla.suse.com/1258942 SUSE Bug 1258942