How severe is CVE-2012-3423?

CVE-2012-3423 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2012-3423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3423?

CVE-2012-3423 primarily affects Redhat Icedtea-web. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-3423?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2012-3423 published?

CVE-2012-3423 was published on 2012-08-07 and last updated on 2026-06-16.

CVE-2012-3423

CVE-2012-3423 is a high-severity vulnerability in Redhat Icedtea-web with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Redhat Icedtea-web
Published: 2012-08-07
Last modified: 2026-06-16

Description

The IcedTea-Web plugin before 1.2.1 does not properly handle NPVariant NPStrings without NUL terminators, which allows remote attackers to cause a denial of service (crash), obtain sensitive information from memory, or execute arbitrary code via a crafted Java applet.

Frequently asked questions

What is CVE-2012-3423?: The IcedTea-Web plugin before 1.2.1 does not properly handle NPVariant NPStrings without NUL terminators, which allows remote attackers to cause a denial of service (crash), obtain sensitive information from memory, or execute arbitrary code via a crafted Java applet.
How severe is CVE-2012-3423?: CVE-2012-3423 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2012-3423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3423?: CVE-2012-3423 primarily affects Redhat Icedtea-web. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2012-3423 published?: CVE-2012-3423 was published on 2012-08-07 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:redhat:icedtea-web:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:icedtea-web:1.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:icedtea-web:1.1:*:*:*:*:*:*:*

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