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Fencer Vulns
high 7.5

CVE-2007-4137 json

Off-by-one error in the QUtf8Decoder::toUnicode function in Trolltech Qt 3 allows context-dependent attackers to cause a denial of service…

published 2007-09-18 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-4121

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

Off-by-one error in the QUtf8Decoder::toUnicode function in Trolltech Qt 3 allows context-dependent attackers to cause a denial of service (crash) via a crafted Unicode string that triggers a heap-based buffer overflow. NOTE: Qt 4 has the same error in the QUtf8Codec::convertToUnicode function, but it is not exploitable.

Patch / fix

  • qt RHEL 2.1 1:2.3.1-14.EL2
  • qt RHEL 3 1:3.1.2-17.RHEL3
  • qt RHEL 4 1:3.3.3-13.RHEL4
  • qt RHEL 5 1:3.3.6-23.el5
  • qt-Xt RHEL 2.1 1:2.3.1-14.EL2
  • qt-ODBC RHEL 3 1:3.1.2-17.RHEL3
  • qt-ODBC RHEL 4 1:3.3.3-13.RHEL4
  • qt-ODBC RHEL 5 1:3.3.6-23.el5

red hat advisories RHSA-2007:0883

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-2007-4137 updated

QT off by one buffer overflow

  • Red Hat Desktop version 3 qt 3.1.2-17.RHEL3, qt-ODBC 3.1.2-17.RHEL3, qt-MySQL 3.1.2-17.RHEL3, qt-config 3.1.2-17.RHEL3, qt-designer 3.1.2-17.RHEL3 Red Hat Enterprise Linux (v. 5 server) qt 3.3.6-23.el5, qt-ODBC 3.3.6-23.el5, qt-MySQL 3.3.6-23.el5, qt-config 3.3.6-23.el5, qt-designer 3.3.6-23.el5, qt-PostgreSQL 3.3.6-23.el5 Red Hat Enterprise Linux AS (Advanced Server) version 2.1 qt 2.3.1-14.EL2, qt-Xt 2.3.1-14.EL2, qt-designer 2.3.1-14.EL2 Red Hat Enterprise Linux AS version 3 qt 3.1.2-17.RHEL3, qt-ODBC 3.1.2-17.RHEL3, qt-MySQL 3.1.2-17.RHEL3, qt-config 3.1.2-17.RHEL3, qt-designer 3.1.2-17.RHEL3 Red Hat Enterprise Linux AS version 4 qt 3.3.3-13.RHEL4, qt-ODBC 3.3.3-13.RHEL4, qt-MySQL 3.3.3-13.RHEL4, qt-config 3.3.3-13.RHEL4, qt-designer 3.3.3-13.RHEL4, qt-PostgreSQL 3.3.3-13.RHEL4 Red Hat Enterprise Linux Desktop (v. 5 client) qt 3.3.6-23.el5, qt-ODBC 3.3.6-23.el5, qt-MySQL 3.3.6-23.el5, qt-config 3.3.6-23.el5, qt-designer 3.3.6-23.el5, qt-PostgreSQL 3.3.6-23.el5
    +9 more products
    Red Hat Enterprise Linux Desktop version 4 qt 3.3.3-13.RHEL4, qt-ODBC 3.3.3-13.RHEL4, qt-MySQL 3.3.3-13.RHEL4, qt-config 3.3.3-13.RHEL4, qt-designer 3.3.3-13.RHEL4, qt-PostgreSQL 3.3.3-13.RHEL4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) qt 3.3.6-23.el5, qt-ODBC 3.3.6-23.el5, qt-MySQL 3.3.6-23.el5, qt-config 3.3.6-23.el5, qt-designer 3.3.6-23.el5, qt-PostgreSQL 3.3.6-23.el5 Red Hat Enterprise Linux ES version 2.1 qt 2.3.1-14.EL2, qt-Xt 2.3.1-14.EL2, qt-designer 2.3.1-14.EL2 Red Hat Enterprise Linux ES version 3 qt 3.1.2-17.RHEL3, qt-ODBC 3.1.2-17.RHEL3, qt-MySQL 3.1.2-17.RHEL3, qt-config 3.1.2-17.RHEL3, qt-designer 3.1.2-17.RHEL3 Red Hat Enterprise Linux ES version 4 qt 3.3.3-13.RHEL4, qt-ODBC 3.3.3-13.RHEL4, qt-MySQL 3.3.3-13.RHEL4, qt-config 3.3.3-13.RHEL4, qt-designer 3.3.3-13.RHEL4, qt-PostgreSQL 3.3.3-13.RHEL4 Red Hat Enterprise Linux WS version 2.1 qt 2.3.1-14.EL2, qt-Xt 2.3.1-14.EL2, qt-designer 2.3.1-14.EL2 Red Hat Enterprise Linux WS version 3 qt 3.1.2-17.RHEL3, qt-ODBC 3.1.2-17.RHEL3, qt-MySQL 3.1.2-17.RHEL3, qt-config 3.1.2-17.RHEL3, qt-designer 3.1.2-17.RHEL3 Red Hat Enterprise Linux WS version 4 qt 3.3.3-13.RHEL4, qt-ODBC 3.3.3-13.RHEL4, qt-MySQL 3.3.3-13.RHEL4, qt-config 3.3.3-13.RHEL4, qt-designer 3.3.3-13.RHEL4, qt-PostgreSQL 3.3.3-13.RHEL4 Red Hat Linux Advanced Workstation 2.1 qt 2.3.1-14.EL2, qt-Xt 2.3.1-14.EL2, qt-designer 2.3.1-14.EL2
    fixed: vendor fix RHSA-2007:0883

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

2.34% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

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

References

Sources

Fencer Vulns 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.