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Fencer Intel
low 3.5

CVE-2011-0311 json

The class file parser in IBM Java before 1.4.2 SR13 FP9, as used in IBM Runtimes for Java Technology 5.0.0 before SR13 and 6.0.0 before SR1…

published 2011-09-02 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0337

cvss
3.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

The class file parser in IBM Java before 1.4.2 SR13 FP9, as used in IBM Runtimes for Java Technology 5.0.0 before SR13 and 6.0.0 before SR10, allows remote authenticated users to cause a denial of service (JVM segmentation fault, and possibly memory consumption or an infinite loop) via a crafted attribute length field in a class file, which triggers a buffer over-read.

Patch / fix

  • java-1.4.2-ibm RHEL 4 EXTRAS 1.4.2.13.10-1jpp.1.el4
  • java-1.4.2-ibm RHEL 5 EXTRAS 1.4.2.13.10-1jpp.1.el5
  • java-1.4.2-ibm-src RHEL 4 EXTRAS 1.4.2.13.10-1jpp.1.el4
  • java-1.4.2-ibm-src RHEL 5 EXTRAS 1.4.2.13.10-1jpp.1.el5
  • java-1.4.2-ibm-demo RHEL 4 EXTRAS 1.4.2.13.10-1jpp.1.el4
  • java-1.4.2-ibm-demo RHEL 5 EXTRAS 1.4.2.13.10-1jpp.1.el5
  • java-1.4.2-ibm-jdbc RHEL 4 EXTRAS 1.4.2.13.10-1jpp.1.el4
  • java-1.4.2-ibm-jdbc RHEL 5 EXTRAS 1.4.2.13.10-1jpp.1.el5

red hat advisories RHSA-2011:1265RHSA-2011:1159

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-0311 updated cvss 3.5

IBM JDK Class file parsing denial-of-service

  • Red Hat Desktop version 4 Extras java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el4 Red Hat Enterprise Linux AS version 4 Extras java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el4 Red Hat Enterprise Linux Desktop Supplementary (v. 5) java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el5 Red Hat Enterprise Linux ES version 4 Extras java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el4 Red Hat Enterprise Linux Server Supplementary (v. 5) java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el5, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el5 Red Hat Enterprise Linux WS version 4 Extras java-1.4.2-ibm 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-src 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-demo 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-jdbc 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-plugin 1.4.2.13.10-1jpp.1.el4, java-1.4.2-ibm-javacomm 1.4.2.13.10-1jpp.1.el4
    fixed: vendor fix RHSA-2011:1159
  • Red Hat RHEL 4 AS for SAP java-1.4.2-ibm-sap 1.4.2.13.10.sap-1jpp.1.el4_8, java-1.4.2-ibm-sap-src 1.4.2.13.10.sap-1jpp.1.el4_8, java-1.4.2-ibm-sap-demo 1.4.2.13.10.sap-1jpp.1.el4_8, java-1.4.2-ibm-sap-javacomm 1.4.2.13.10.sap-1jpp.1.el4_8 Red Hat RHEL 5 Server for SAP java-1.4.2-ibm-sap 1.4.2.13.10.sap-1jpp.1.el5, java-1.4.2-ibm-sap-src 1.4.2.13.10.sap-1jpp.1.el5, java-1.4.2-ibm-sap-demo 1.4.2.13.10.sap-1jpp.1.el5, java-1.4.2-ibm-sap-javacomm 1.4.2.13.10.sap-1jpp.1.el5
    fixed: vendor fix RHSA-2011:1265

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.