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TI-2009-01864 Aliases CVE-2009-1956GHSA-4wj9-j34x-wjxp

Off-by-one error in the apr_brigade_vprintf function in Apache APR-util before 1.3.5 on…

Priority MEDIUM 42CWE-189Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · None · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

Off-by-one error in the apr_brigade_vprintf function in Apache APR-util before 1.3.5 on big-endian platforms allows remote attackers to obtain sensitive information or cause a denial of service (application crash) via crafted input.

Why it matters now

EPSS 0.12042 96th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:apache:apr-util:*:*:*:*:*:*:*:*up to 1.3.4VulnerableApache
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*2.2.0 to before 2.2.12VulnerableApache
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*6.06VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:*8.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*8.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*9.04VulnerableCanonical
  • cpe:2.3:a:apache:apr-util:*:*:*:*:*:*:*:* Versions up to 1.3.4 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.2.0 to before 2.2.12 Vulnerable ·Apache
  • cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* Versions 6.06 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:* Versions 8.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:* Versions 8.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:* Versions 9.04 Vulnerable ·Canonical

Remediation

Red Hat 3 advisories

  • RHSA-2010:0602 Released 2010-08-04 · Red Hat rating Moderate
    Red Hat Certificate System 7.3 security update
    • Red Hat Certificate System 7.3 for 4AS ant-1.6.5-1jpp_1rh, avalon-logkit-1.2-2jpp_4rh, axis-1.2.1-1jpp_3rh +39
    • Red Hat Certificate System 7.3 for 4ES ant-1.6.5-1jpp_1rh, avalon-logkit-1.2-2jpp_4rh, axis-1.2.1-1jpp_3rh +39
  • RHSA-2009:1108 Released 2009-06-16 · Red Hat rating Moderate
    httpd security update
    • Red Hat Desktop version 3 httpd-2.0.46-73.ent, httpd-2.0.46-73.ent.i386, httpd-devel-2.0.46-73.ent +3
    • Red Hat Enterprise Linux AS version 3 httpd-2.0.46-73.ent, httpd-2.0.46-73.ent.i386, httpd-2.0.46-73.ent.ia64 +9
    • Red Hat Enterprise Linux ES version 3 httpd-2.0.46-73.ent, httpd-2.0.46-73.ent.i386, httpd-2.0.46-73.ent.ia64 +6
    • Red Hat Enterprise Linux WS version 3 httpd-2.0.46-73.ent, httpd-2.0.46-73.ent.i386, httpd-2.0.46-73.ent.ia64 +6
  • RHSA-2009:1107 Released 2009-06-16 · Red Hat rating Moderate
    apr-util security update
    • Red Hat Enterprise Linux (v. 5 server) apr-util-1.2.7-7.el5_3.1, apr-util-1.2.7-7.el5_3.1.i386, apr-util-1.2.7-7.el5_3.1.ia64 +9
    • Red Hat Enterprise Linux AS version 4 apr-util-0.9.4-22.el4_8.1, apr-util-0.9.4-22.el4_8.1.i386, apr-util-0.9.4-22.el4_8.1.ia64 +5
    • Red Hat Enterprise Linux Desktop (v. 5 client) apr-util-1.2.7-7.el5_3.1, apr-util-1.2.7-7.el5_3.1.i386, apr-util-docs-1.2.7-7.el5_3.1 +1
    • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) apr-util-1.2.7-7.el5_3.1, apr-util-devel-1.2.7-7.el5_3.1, apr-util-devel-1.2.7-7.el5_3.1.i386
    • Red Hat Enterprise Linux Desktop version 4 apr-util-0.9.4-22.el4_8.1, apr-util-0.9.4-22.el4_8.1.i386, apr-util-devel-0.9.4-22.el4_8.1 +1
    • Red Hat Enterprise Linux ES version 4 apr-util-0.9.4-22.el4_8.1, apr-util-0.9.4-22.el4_8.1.i386, apr-util-0.9.4-22.el4_8.1.ia64 +3
    • Red Hat Enterprise Linux WS version 4 apr-util-0.9.4-22.el4_8.1, apr-util-0.9.4-22.el4_8.1.i386, apr-util-0.9.4-22.el4_8.1.ia64 +3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Certificate System 7.3 for 4ASFixed RHSA-2010:0602
Red Hat Certificate System 7.3 for 4ESFixed RHSA-2010:0602
Red Hat Desktop version 3Fixed RHSA-2009:1108
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2009:1107
Red Hat Enterprise Linux AS version 3Fixed RHSA-2009:1108
Red Hat Enterprise Linux AS version 4Fixed RHSA-2009:1107
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2009:1107
Red Hat Enterprise Linux Desktop Workstation (v. 5 client)Fixed RHSA-2009:1107
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2009:1107
Red Hat Enterprise Linux ES version 3Fixed RHSA-2009:1108
Red Hat Enterprise Linux ES version 4Fixed RHSA-2009:1107
Red Hat Enterprise Linux WS version 3Fixed RHSA-2009:1108
Red Hat Enterprise Linux WS version 4Fixed RHSA-2009:1107

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-1956
  2. 2026-10-03 Alias added: GHSA-4wj9-j34x-wjxp

References

Exploit 2

Patch 1

Advisory 21

Other 17

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences