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Vulnerability record · CVE-2009-1956 · published 8 June 2009

CVE-2009-1956: Apache apr-util vulnerability

Apache · Apr Util

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.

6.4 CVSS 2.0 Medium EPSS 12% · top 4.0% CWE-189 · CWE-189
6.4CVSS 2.0 base score
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
102References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:N/A:P

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html Mailing ListThird Party Advisory
http://marc.info/?l=bugtraq&m=129190899612998&w=2 Mailing ListThird Party Advisory
http://secunia.com/advisories/34724 Broken Link
http://secunia.com/advisories/35284 Broken Link
http://secunia.com/advisories/35395 Broken Link
http://secunia.com/advisories/35487 Broken Link
http://secunia.com/advisories/35565 Broken Link
http://secunia.com/advisories/35710 Broken Link
http://secunia.com/advisories/35797 Broken Link
http://secunia.com/advisories/35843 Broken Link
http://secunia.com/advisories/37221 Broken Link
http://security.gentoo.org/glsa/glsa-200907-03.xml Third Party Advisory
http://support.apple.com/kb/HT3937 Third Party Advisory
http://svn.apache.org/viewvc?view=rev&revision=768417 PatchThird Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK88341 Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK91241 Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg1PK99478 Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg27014463 Third Party Advisory
http://www.apache.org/dist/apr/CHANGES-APR-UTIL-1.3 Vendor Advisory
http://www.mail-archive.com/dev%40apr.apache.org/msg21591.html
http://www.mail-archive.com/dev%40apr.apache.org/msg21592.html
http://www.mandriva.com/security/advisories?name=MDVSA-2009:131 Broken Link
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 Broken Link
http://www.openwall.com/lists/oss-security/2009/06/06/1 ExploitMailing ListPatch
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1107.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1108.html Third Party Advisory
http://www.securityfocus.com/bid/35251 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/usn-786-1 Third Party Advisory
http://www.ubuntu.com/usn/usn-787-1 Third Party Advisory
http://www.vupen.com/english/advisories/2009/1907 Permissions Required
http://www.vupen.com/english/advisories/2009/3184 Permissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=504390 ExploitIssue TrackingPatchThird Party Advisory
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%
https://lists.apache.org/thread.html/r2295080a257bad27ea68ca0af12fc715577f9e84801eae116a33107e%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org

Track CVE-2009-1956 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2009-1956), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.