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Fencer Intel
critical 9.8

CVE-2018-7409 json

In unixODBC before 2.3.5, there is a buffer overflow in the unicode_to_ansi_copy() function in DriverManager/__info.c.

published 2018-02-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19140

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

In unixODBC before 2.3.5, there is a buffer overflow in the unicode_to_ansi_copy() function in DriverManager/__info.c.

Patch / fix

  • unixodbc unixodbc 2.3.5
  • unixodbc Debian 14, Debian 13, Debian 12 2.3.6-0.1

debian advisories DEBIAN-CVE-2018-7409

  • unixodbc Ubuntu 18.04 LTS 2.3.4-1.1ubuntu3
  • unixodbc Ubuntu Pro 14.04 LTS 2.2.14p2-5ubuntu5+esm1
  • unixodbc Ubuntu Pro 16.04 LTS 2.3.1-4.1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-7409

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • unixODBC RHEL 7 2.3.1-14.el7
  • unixODBC RHEL 7.6 EUS 2.3.1-14.el7_6

red hat advisories RHSA-2020:4999RHSA-2019:2336

  • unixODBC SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +1 more 2.3.6-7.9.1

suse advisories SUSE-SU-2018:1832-1

  • unixODBC openSUSE Tumbleweed 2.3.9-3.4

opensuse advisories openSUSE-SU-2024:11483-1

  • unixodbc Arch Linux 2.3.5-1

arch linux advisories AVG-627

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-2018-7409 updated cvss 5.3

unixODBC: Buffer overflow in unicode_to_ansi_copy() can lead to crash or other unspecified impact

  • Red Hat Enterprise Linux 5 unixODBC, unixODBC64 Red Hat Enterprise Linux 6 unixODBC, unixODBC-kde
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) unixODBC 2.3.1-14.el7 Red Hat Enterprise Linux Client Optional (v. 7) unixODBC-devel 2.3.1-14.el7, unixODBC-debuginfo 2.3.1-14.el7 Red Hat Enterprise Linux ComputeNode (v. 7) unixODBC 2.3.1-14.el7
    fixed: vendor fix RHSA-2019:2336
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) unixODBC 2.3.1-14.el7_6
    fixed: vendor fix RHSA-2020:4999
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) unixODBC-devel 2.3.1-14.el7, unixODBC-debuginfo 2.3.1-14.el7
    fixed: vendor fix RHSA-2019:2336
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) unixODBC-devel 2.3.1-14.el7_6, unixODBC-debuginfo 2.3.1-14.el7_6 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) unixODBC 2.3.1-14.el7_6
    fixed: vendor fix RHSA-2020:4999
  • Red Hat Enterprise Linux Server (v. 7) unixODBC 2.3.1-14.el7
    fixed: vendor fix RHSA-2019:2336
  • Red Hat Enterprise Linux Server EUS (v. 7.6) unixODBC 2.3.1-14.el7_6
    fixed: vendor fix RHSA-2020:4999
  • Red Hat Enterprise Linux Workstation (v. 7) unixODBC 2.3.1-14.el7
    fixed: vendor fix RHSA-2019:2336
show 1 more
  • Red Hat Enterprise Linux 8 unixODBC
    not affected: vulnerable code not present

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

2.54% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 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.