CVE-2025-55753

Name
CVE-2025-55753
Description
An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then are repeated without delays until it succeeds. This issue affects Apache HTTP Server: from 2.4.30 before 2.4.66. Users are recommended to upgrade to version 2.4.66, which fixes the issue.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
vendor-advisory https://httpd.apache.org/security/vulnerabilities_24.html
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2025/12/04/4

Match rules

CPE URI Source package Min version Max version
apache-http-server >= 2.4.30 < 2.4.66
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* http_server >= 2.4.30 < 2.4.66

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
apache2 edge-main 2.4.66-r0 Kaarle Ritvanen <kunkku@alpinelinux.org> fixed
apache2 3.23-main 2.4.66-r0 Kaarle Ritvanen <kunkku@alpinelinux.org> fixed
apache2 3.22-main 2.4.66-r0 Kaarle Ritvanen <kunkku@alpinelinux.org> fixed
apache2 3.21-main 2.4.66-r0 Kaarle Ritvanen <kunkku@alpinelinux.org> fixed
apache2 3.20-main 2.4.66-r0 Kaarle Ritvanen <kunkku@alpinelinux.org> fixed