PT-2009-6569 · Mybb · Mybb

Hanno Böck · Published 2009-12-29 · Updated 2025-09-26 · CVE-2009-4448

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MyBB versions 1.4.10 and earlier

Description The issue allows remote attackers to cause a denial of service, specifically CPU consumption, via a crafted request. This request includes a large year value, which triggers a long loop. The vulnerable component is the inc/functions time.php file, and the issue can be reached through member.php and possibly other vectors.

Recommendations For MyBB versions 1.4.10 and earlier, consider restricting access to the inc/functions time.php file or the affected member.php vector to minimize the risk of exploitation. Additionally, as a temporary workaround, consider implementing input validation to limit the year value in crafted requests until a patch is available.

Fix

DoS

Weakness Enumeration

CWE-399

Related Identifiers

CVE-2009-4448

Affected Products

Mybb

References · 10

• http://dev.mybboard.net/issues/600 · Patch
• http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2009-4448 · Security Note
• http://secunia.com/advisories/37906 · Vendor Advisory
• http://openwall.com/lists/oss-security/2010/10/11/8 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4448 · Note
• http://dev.mybboard.net/projects/mybb/repository/revisions/4613/diff/branches/1.4-stable/inc/functions_time.php · Note
• http://openwall.com/lists/oss-security/2010/10/08/7 · Note
• http://openwall.com/lists/oss-security/2010/12/06/2 · Note
• https://t.me/cveNotify/136639 · Telegram Post