Is CVE-2017-3261 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2017-3261 being exploited in the wild.

How severe is CVE-2017-3261?

Medium severity, with a CVSS score of 4.3, published 27 January 2017.

Which products and versions are affected?

Oracle Java SE 6u131, 7u121, 8u112; Oracle Java SE Embedded 8u111.

Is there a fix for CVE-2017-3261?

A patch was published on 2017-01-19: Red Hat released security updates for Java 1.7 and 1.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2017-3261 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2017-3261?

Check whether you run Oracle Java SE or Oracle Java SE Embedded at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2017-3261: Oracle Java SE integer overflow in Networking SocketOutputStream

CVE-2017-3261 · Severity: medium · CVSS 4.3 · Published 2017-01-27

A vulnerability exists in the Networking component of Oracle Java SE and Java SE Embedded. This flaw primarily affects client-side Java deployments, such as web applets or Java Web Start applications that run untrusted code from the internet. If exploited, an attacker could gain unauthorized access to a limited portion of the data accessible by the Java application, potentially compromising sensitive information. Successful exploitation requires a user to perform a specific action, such as visiting a malicious website.

Technologies: Oracle Java SE, Oracle Java SE Embedded. Vendors: Oracle.

Quick answers

Is CVE-2017-3261 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2017-3261 being exploited in the wild.
How severe is CVE-2017-3261?: Medium severity, with a CVSS score of 4.3, published 27 January 2017.
Which products and versions are affected?: Oracle Java SE 6u131, 7u121, 8u112; Oracle Java SE Embedded 8u111.
Is there a fix for CVE-2017-3261?: A patch was published on 2017-01-19: Red Hat released security updates for Java 1.7 and 1.8. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2017-3261 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2017-3261?: Check whether you run Oracle Java SE or Oracle Java SE Embedded at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An integer overflow vulnerability exists in the SocketOutputStream boundary check within the Networking subcomponent of Oracle Java SE. The flaw is easily exploitable by an unauthenticated attacker with network access via multiple protocols. Successful exploitation requires user interaction (UI:R), typically involving a user running a sandboxed Java Web Start application or applet that loads untrusted code. An attacker can leverage this overflow to bypass security checks and achieve unauthorized read access to a subset of data accessible to the Java runtime. This issue was addressed in the Oracle January 2017 Critical Patch Update.

Affected products

Oracle Java SE 6u131, 7u121, 8u112
Oracle Java SE Embedded 8u111

Timeline

2017-01-19: patched: Red Hat released security updates for Java 1.7 and 1.8.
2017-01-27: disclosed: Initial NVD publication date.

References

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