CVE-2009-1103 Deserialization in n/a

Medium 6.4 Published Updated

Remote attackers can execute arbitrary code and access files via malicious applet deserialization in Java Runtime Environment.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2009-1103?

CVE-2009-1103 is a medium-severity unsafe deserialization vulnerability in n/a, published on 25 Mar 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Unspecified vulnerability in the Java Plug-in in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 17 and earlier; 6 Update 12 and earlier; 1.4.2_19 and earlier; and 1.3.1_24 and earlier allows remote attackers to access files and execute arbitrary code via unknown vectors related to "deserializing applets," aka CR 6646860.

Which versions are affected by CVE-2009-1103?

It affects 1 product.

Products include Sun Java.

How do I fix CVE-2009-1103?

Upgrade to a fixed version.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2009-1103 being exploited?

There is no known exploitation of CVE-2009-1103 in the wild and no public exploit code.

Sources

Also known as GHSA-4hqw-69p6-5rh9.

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