CVE-2025-40911
Description
Net::CIDR::Set versions 0.10 through 0.13 for Perl does not properly handle leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses. Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation. Net::CIDR::Set used code from Net::CIDR::Lite, which had a similar vulnerability CVE-2021-47154.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2025-40911 NameCVE-2025-40911 DescriptionNet::CIDR::Set versions 0.10 through 0.13 for Perl does not properly handle leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses. Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who…
CVE-2025-40911
| Name | CVE-2025-40911 |
| Description | Net::CIDR::Set versions 0.10 through 0.13 for Perl does not properly handle leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses. Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation. Net::CIDR::Set used code from Net::CIDR::Lite, which had a similar vulnerability CVE-2021-47154. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1106699 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libnet-cidr-set-perl (PTS) | bullseye | 0.13-3 | vulnerable |
| bookworm | 0.13-4 | vulnerable | |
| trixie | 0.15-1 | fixed | |
| forky | 0.20-1 | fixed | |
| sid | 0.21-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libnet-cidr-set-perl | source | (unstable) | 0.15-1 | 1106699 |
Notes
[bookworm] - libnet-cidr-set-perl <no-dsa> (Minor issue)
[bullseye] - libnet-cidr-set-perl <postponed> (Minor issue)
https://lists.security.metacpan.org/cve-announce/msg/29942240/
Fixed by: https://github.com/robrwo/perl-Net-CIDR-Set/commit/be7d91e8446ad8013b08b4be313d666dab003a8a (v0.14)
Apply commands
[bookworm] - libnet-cidr-set-perl <no-dsa> (Minor issue)[bullseye] - libnet-cidr-set-perl <postponed> (Minor issue)https://lists.security.metacpan.org/cve-announce/msg/29942240/Fixed by: https://github.com/robrwo/perl-Net-CIDR-Set/commit/be7d91e8446ad8013b08b4be313d666dab003a8a (v0.14)OS impact
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.15-1 |
| sid | Fixed | 0.15-1 |
| forky | Fixed | 0.15-1 |
| bullseye | Affected | — |
| bookworm | Affected | — |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.