var-201302-0407
Vulnerability from variot
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 through Update 11, 6 through Update 38, 5.0 through Update 38, and 1.4.2_40 and earlier, and OpenJDK 6 and 7, allows remote attackers to affect confidentiality, integrity, and availability via vectors related to AWT. NOTE: the previous information is from the February 2013 CPU. Oracle has not commented on claims from another vendor that this issue is related to "insufficient validation of raster parameters" in awt_parseImage.c, which triggers memory corruption. (DoS) An attack may be carried out. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.The specific flaw exists within the Java AWT Image Transform library functions. For certain image transformation functions, Java fails to take the 'numBands' into account during the allocation of heap memory and instead uses a static value of 0x4. The allocated memory is later written to inside a loop that uses the 'numBands' value which can result in a memory corruption. This can lead to remote code execution under the context of the current process. Note: This issue was previously discussed in BID 57670 (Oracle Java Runtime Environment Multiple Security Vulnerabilities) but has been given its own record to better document it. This vulnerability affects the following supported versions: 7 Update 11, 6 Update 38, 5.0 Update 38, 1.4.2_40. In a typical operating environment, these are of low security risk as the runtime is not used on untrusted applets. ============================================================================ Ubuntu Security Notice USN-1724-1 February 14, 2013
openjdk-6, openjdk-7 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in OpenJDK. An attacker could exploit these to cause a denial of service. (CVE-2012-1541, CVE-2012-3342, CVE-2013-0351, CVE-2013-0419, CVE-2013-0423, CVE-2013-0446, CVE-2012-3213, CVE-2013-0425, CVE-2013-0426, CVE-2013-0428, CVE-2013-0429, CVE-2013-0430, CVE-2013-0441, CVE-2013-0442, CVE-2013-0445, CVE-2013-0450, CVE-2013-1475, CVE-2013-1476, CVE-2013-1478, CVE-2013-1480)
Vulnerabilities were discovered in the OpenJDK JRE related to information disclosure. (CVE-2013-0409, CVE-2013-0434, CVE-2013-0438)
Several data integrity vulnerabilities were discovered in the OpenJDK JRE. (CVE-2013-0424, CVE-2013-0427, CVE-2013-0433, CVE-2013-1473)
Several vulnerabilities were discovered in the OpenJDK JRE related to information disclosure and data integrity. (CVE-2013-0432, CVE-2013-0435, CVE-2013-0443)
A vulnerability was discovered in the OpenJDK JRE related to availability. An attacker could exploit this to cause a denial of service. (CVE-2013-0440)
A vulnerability was discovered in the OpenJDK JRE related to information disclosure and data integrity. An attacker could exploit this to cause a denial of service. This issue only affected Ubuntu 12.10. (CVE-2013-0444)
A data integrity vulnerability was discovered in the OpenJDK JRE. This issue only affected Ubuntu 12.10. (CVE-2013-0448)
An information disclosure vulnerability was discovered in the OpenJDK JRE. This issue only affected Ubuntu 12.10. (CVE-2013-0449)
A vulnerability was discovered in the OpenJDK JRE related to information disclosure and data integrity. An attacker could exploit this to cause a denial of service. This issue did not affect Ubuntu 12.10. (CVE-2013-1481)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.10: icedtea-7-jre-jamvm 7u13-2.3.6-0ubuntu0.12.10.1 openjdk-7-jre 7u13-2.3.6-0ubuntu0.12.10.1 openjdk-7-jre-headless 7u13-2.3.6-0ubuntu0.12.10.1 openjdk-7-jre-lib 7u13-2.3.6-0ubuntu0.12.10.1 openjdk-7-jre-zero 7u13-2.3.6-0ubuntu0.12.10.1
Ubuntu 12.04 LTS: icedtea-6-jre-cacao 6b27-1.12.1-2ubuntu0.12.04.2 icedtea-6-jre-jamvm 6b27-1.12.1-2ubuntu0.12.04.2 openjdk-6-jre 6b27-1.12.1-2ubuntu0.12.04.2 openjdk-6-jre-headless 6b27-1.12.1-2ubuntu0.12.04.2 openjdk-6-jre-lib 6b27-1.12.1-2ubuntu0.12.04.2 openjdk-6-jre-zero 6b27-1.12.1-2ubuntu0.12.04.2
Ubuntu 11.10: icedtea-6-jre-cacao 6b27-1.12.1-2ubuntu0.11.10.2 icedtea-6-jre-jamvm 6b27-1.12.1-2ubuntu0.11.10.2 openjdk-6-jre 6b27-1.12.1-2ubuntu0.11.10.2 openjdk-6-jre-headless 6b27-1.12.1-2ubuntu0.11.10.2 openjdk-6-jre-lib 6b27-1.12.1-2ubuntu0.11.10.2 openjdk-6-jre-zero 6b27-1.12.1-2ubuntu0.11.10.2
Ubuntu 10.04 LTS: icedtea-6-jre-cacao 6b27-1.12.1-2ubuntu0.10.04.2 openjdk-6-jre 6b27-1.12.1-2ubuntu0.10.04.2 openjdk-6-jre-headless 6b27-1.12.1-2ubuntu0.10.04.2 openjdk-6-jre-lib 6b27-1.12.1-2ubuntu0.10.04.2 openjdk-6-jre-zero 6b27-1.12.1-2ubuntu0.10.04.2
This update uses a new upstream release which includes additional bug fixes. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Critical: java-1.6.0-openjdk security update Advisory ID: RHSA-2013:0245-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0245.html Issue date: 2013-02-08 CVE Names: CVE-2013-0424 CVE-2013-0425 CVE-2013-0426 CVE-2013-0427 CVE-2013-0428 CVE-2013-0429 CVE-2013-0432 CVE-2013-0433 CVE-2013-0434 CVE-2013-0435 CVE-2013-0440 CVE-2013-0441 CVE-2013-0442 CVE-2013-0443 CVE-2013-0445 CVE-2013-0450 CVE-2013-1475 CVE-2013-1476 CVE-2013-1478 CVE-2013-1480 =====================================================================
- Summary:
Updated java-1.6.0-openjdk packages that fix several security issues are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having critical security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
- Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
- Description:
These packages provide the OpenJDK 6 Java Runtime Environment and the OpenJDK 6 Software Development Kit.
Multiple improper permission check issues were discovered in the AWT, CORBA, JMX, and Libraries components in OpenJDK. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions. (CVE-2013-0442, CVE-2013-0445, CVE-2013-0441, CVE-2013-1475, CVE-2013-1476, CVE-2013-0429, CVE-2013-0450, CVE-2013-0425, CVE-2013-0426, CVE-2013-0428)
Multiple flaws were found in the way image parsers in the 2D and AWT components handled image raster parameters. A specially-crafted image could cause Java Virtual Machine memory corruption and, possibly, lead to arbitrary code execution with the virtual machine privileges. (CVE-2013-1478, CVE-2013-1480)
A flaw was found in the AWT component's clipboard handling code. An untrusted Java application or applet could use this flaw to access clipboard data, bypassing Java sandbox restrictions. (CVE-2013-0432)
The default Java security properties configuration did not restrict access to certain com.sun.xml.internal packages. An untrusted Java application or applet could use this flaw to access information, bypassing certain Java sandbox restrictions. This update lists the whole package as restricted. (CVE-2013-0435)
Multiple improper permission check issues were discovered in the Libraries, Networking, and JAXP components. An untrusted Java application or applet could use these flaws to bypass certain Java sandbox restrictions. (CVE-2013-0427, CVE-2013-0433, CVE-2013-0434)
It was discovered that the RMI component's CGIHandler class used user inputs in error messages without any sanitization. An attacker could use this flaw to perform a cross-site scripting (XSS) attack. (CVE-2013-0424)
It was discovered that the SSL/TLS implementation in the JSSE component did not properly enforce handshake message ordering, allowing an unlimited number of handshake restarts. A remote attacker could use this flaw to make an SSL/TLS server using JSSE consume an excessive amount of CPU by continuously restarting the handshake. (CVE-2013-0440)
It was discovered that the JSSE component did not properly validate Diffie-Hellman public keys. An SSL/TLS client could possibly use this flaw to perform a small subgroup attack. (CVE-2013-0443)
Note: If the web browser plug-in provided by the icedtea-web package was installed, the issues exposed via Java applets could have been exploited without user interaction if a user visited a malicious website.
This erratum also upgrades the OpenJDK package to IcedTea6 1.11.6. Refer to the NEWS file, linked to in the References, for further information.
All users of java-1.6.0-openjdk are advised to upgrade to these updated packages, which resolve these issues. All running instances of OpenJDK Java must be restarted for the update to take effect.
- Solution:
Before applying this update, make sure all previously-released errata relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258
- Bugs fixed (http://bugzilla.redhat.com/):
859140 - CVE-2013-0440 OpenJDK: CPU consumption DoS via repeated SSL ClientHello packets (JSSE, 7192393) 860652 - CVE-2013-1475 OpenJDK: IIOP type reuse sandbox bypass (CORBA, 8000540, SE-2012-01 Issue 50) 906813 - CVE-2013-0424 OpenJDK: RMI CGIHandler XSS issue (RMI, 6563318) 906892 - CVE-2013-0435 OpenJDK: com.sun.xml.internal.* not restricted packages (JAX-WS, 7201068) 906894 - CVE-2013-1478 OpenJDK: image parser insufficient raster parameter checks (2D, 8001972) 906899 - CVE-2013-0442 OpenJDK: insufficient privilege checking issue (AWT, 7192977) 906900 - CVE-2013-0445 OpenJDK: insufficient privilege checking issue (AWT, 8001057) 906904 - CVE-2013-1480 OpenJDK: image parser insufficient raster parameter checks (AWT, 8002325) 906911 - CVE-2013-0450 OpenJDK: RequiredModelMBean missing access control context checks (JMX, 8000537) 907207 - CVE-2013-0428 OpenJDK: reflection API incorrect checks for proxy classes (Libraries, 7197546, SE-2012-01 Issue 29) 907219 - CVE-2013-0432 OpenJDK: insufficient clipboard access premission checks (AWT, 7186952) 907340 - CVE-2013-0443 OpenJDK: insufficient Diffie-Hellman public key checks (JSSE, 7192392) 907344 - CVE-2013-0425 OpenJDK: logging insufficient access control checks (Libraries, 6664509) 907346 - CVE-2013-0426 OpenJDK: logging insufficient access control checks (Libraries, 6664528) 907453 - CVE-2013-0434 OpenJDK: loadPropertyFile missing restrictions (JAXP, 8001235) 907455 - CVE-2013-0427 OpenJDK: invalid threads subject to interrupts (Libraries, 6776941) 907456 - CVE-2013-0433 OpenJDK: InetSocketAddress serialization issue (Networking, 7201071) 907457 - CVE-2013-1476 OpenJDK: missing ValueHandlerImpl class constructor access restriction (CORBA, 8000631) 907458 - CVE-2013-0441 OpenJDK: missing serialization restriction (CORBA, 7201066) 907460 - CVE-2013-0429 OpenJDK: PresentationManager incorrectly shared (CORBA, 7141694)
- Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
x86_64: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
x86_64: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-devel-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-javadoc-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/java-1.6.0-openjdk-1.6.0.0-1.54.1.11.6.el6_3.src.rpm
i386: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.i686.rpm
x86_64: java-1.6.0-openjdk-debuginfo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-demo-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm java-1.6.0-openjdk-src-1.6.0.0-1.54.1.11.6.el6_3.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package
- References:
https://www.redhat.com/security/data/cve/CVE-2013-0424.html https://www.redhat.com/security/data/cve/CVE-2013-0425.html https://www.redhat.com/security/data/cve/CVE-2013-0426.html https://www.redhat.com/security/data/cve/CVE-2013-0427.html https://www.redhat.com/security/data/cve/CVE-2013-0428.html https://www.redhat.com/security/data/cve/CVE-2013-0429.html https://www.redhat.com/security/data/cve/CVE-2013-0432.html https://www.redhat.com/security/data/cve/CVE-2013-0433.html https://www.redhat.com/security/data/cve/CVE-2013-0434.html https://www.redhat.com/security/data/cve/CVE-2013-0435.html https://www.redhat.com/security/data/cve/CVE-2013-0440.html https://www.redhat.com/security/data/cve/CVE-2013-0441.html https://www.redhat.com/security/data/cve/CVE-2013-0442.html https://www.redhat.com/security/data/cve/CVE-2013-0443.html https://www.redhat.com/security/data/cve/CVE-2013-0445.html https://www.redhat.com/security/data/cve/CVE-2013-0450.html https://www.redhat.com/security/data/cve/CVE-2013-1475.html https://www.redhat.com/security/data/cve/CVE-2013-1476.html https://www.redhat.com/security/data/cve/CVE-2013-1478.html https://www.redhat.com/security/data/cve/CVE-2013-1480.html https://access.redhat.com/security/updates/classification/#critical http://icedtea.classpath.org/hg/release/icedtea6-1.11/file/icedtea6-1.11.6/NEWS
- Contact:
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux)
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-- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Hello All,
Below, we are providing you with technical details regarding security issues reported by us to Oracle and addressed by the company in a recent Feb 2013 Java SE CPU [1].
[Issue 29] This issue allows for the creation of arbitrary Proxy objects for interfaces defined in restricted packages. Proxy objects defined in a NULL class loader namespaces are of a particular interest here. Such objects can be used to manipulate instances of certain restricted classes.
In our Proof of Concept code we create such a proxy object for the com.sun.xml.internal.bind.v2.model.nav.Navigator interface. In order to use the aforementioned proxy object, we need an instance of that interface too. We obtain it with the help of Issue 28, which allows to access arbitrary field objects from restricted classes and interfaces. As a result, by combining Issue 27-29, one can use Navigator interface and make use of its sensitive Reflection API functionality such as obtaining access to methods of arbitrary classes. That condition can be further leveraged to obtain a complete JVM security bypass.
Please, note that our Proof of Concept code for Issues 27-29 was reported to Oracle in Apr 2012 and depending Issues 27-28 were addressed by the company sooner than Issue 29. Testing of the PoC will thus give best results on older versions of Java SE 7.
[Issue 50] Issue 50 allows to violate a fundamental security constraint of Java VM, which is type safety. This vulnerability is another instance of the problem related to the unsafe deserialization implemented by com.sun.corba.se.impl.io.ObjectStreamClass class. Its first instance was fixed by Oracle in Oct 2011 [2] and it stemmed from the fact that during deserialization insufficient type checks were done with respect to object references that were written to target object instance created by the means of deserialization. Such a reference writing was accomplished with the use of a native functionality of sun.corba.Bridge class.
The problem that we found back in Sep 2012 was very similar to the first one. It was located in the same code (class) and was also exploiting direct writing of object references to memory with the use of putObject method. While the first type confusion issue allowed to write object references of incompatible types to correct field offsets, Issue 50 relied on the possibility to write object references of incompatible types to...invalid field offsets.
It might be also worth to mention that Issue 50 was found to be present in Java SE Embedded [3]. That is Java version that is based on desktop Java SE and is used in today\x92s most powerful embedded systems such as aircraft and medical systems [4]. We verified that Oracle Java SE Embedded ver. 7 Update 6 from 10 Aug 2012 for ARM / Linux contained vulnerable implementation of ObjectStreamClass class.
Unfortunately, we don't know any details regarding the impact of Issue 50 in the embedded space (which embedded systems are vulnerable to it, whether any feasible attack vectors exist, etc.). So, it's up to Oracle to clarify any potential concerns in that area.
[Issue 52] Issue 52 relies on the possibility to call no-argument methods on arbitrary objects or classes. The vulnerability has its origin in com.sun.jmx.mbeanserver.Introspector class which is located in the same package as the infamous MBeanInstantiator bug found in the wild in early Jan 2013. The flaw stems from insecure call to invoke method of java.lang.reflect.Method class:
if (method != null)
return method.invoke(obj, new Object[0]);
In our Proof of Concept code we exploit the above implementation by making a call to getDeclaredMethods method of java.lang.Class class to gain access to methods of restricted classes. This is accomplished with the use of the following code sequence:
Introspector.elementFromComplex((Object)clazz,"declaredMethods")
Access to public method objects of arbitrary restricted classes is sufficient to achieve a complete Java VM security sandbox compromise. We make use of DefiningClassLoader exploit vector for that purpose.
[Issue 53] Issue 53 stems from the fact that Oracle's implementation of new security levels introduced by the company in Java SE 7 Update 10 did not take into account the fact that Applets can be instantiated with the use of serialization. Such a possibility is indicated both in HTML 4 Specification [5] as well as in Oracle's code.
HTML 4 Specification contains the following description for the "object" attribute of APPLET element:
object = cdata [CS] This attribute names a resource containing a serialized representation of an applet's state. It is interpreted relative to the applet's codebase. The serialized data contains the applet's class name but not the implementation. The class name is used to retrieve the implementation from a class file or archive.
Additionally, Java 7 Update 10 (and 11) reveal the following code logic when it comes to the implementation of new security features (Java Control Panel security levels).
[excerpt from sun.plugin2.applet.Plugin2Manager class]
String object_attr = getSerializedObject();
String code_attr = getCode();
...
if(code_attr != null) {
Class class1 = plugin2classloader.loadCode(code_attr);
...
if(class1 != null)
if (fireAppletSSVValidation())
...
} else {
if(!isSecureVM)
return;
adapter.instantiateSerialApplet(plugin2classloader,object_attr); ... }
The above clearly shows that the conditional block implementing Applet instantiation via deserialization does not contain a call to fireAppletSSVValidation method. This method conducts important security checks corresponding to security levels configured by Java Control Panel. The lack of a call to security checking method is equivalent to "no protection at all" as it allows for a silent Java exploit in particular.
What's worth mentioning is that for Google Chrome the following HTML sequence needed to be used to activate target Applet code: