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{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2021-4456","title":"Title"},{"category":"description","text":"Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact.\n\nThe functions `addr2cidr` and `cidrlookup` may return leading zeros in a CIDR string, which may in turn be parsed as octal numbers by subsequent users. In some cases an attacker may be able to leverage this to bypass access controls based on IP addresses.\n\nThe documentation advises validating untrusted CIDR strings with the `cidrvalidate` function. However, this mitigation is optional and not enforced by default. In practice, users may call `addr2cidr` or `cidrlookup` with untrusted input and without validation, incorrectly assuming that this is safe.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2021-4456","url":"https://www.suse.com/security/cve/CVE-2021-4456"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1259024 for CVE-2021-4456","url":"https://bugzilla.suse.com/1259024"}],"title":"SUSE CVE 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In some cases an attacker may be able to leverage this to bypass access controls based on IP addresses.\n\nThe documentation advises validating untrusted CIDR strings with the `cidrvalidate` function. However, this mitigation is optional and not enforced by default. In practice, users may call `addr2cidr` or `cidrlookup` with untrusted input and without validation, incorrectly assuming that this is safe.","title":"CVE description"}],"product_status":{"recommended":["SUSE Package Hub 15 SP7:perl-Net-CIDR-0.270.0-bp157.2.3.1","openSUSE Leap 16.0:perl-Net-CIDR-0.270.0-bp160.1.1","openSUSE Tumbleweed:perl-Net-CIDR-0.270.0-2.1"]},"references":[{"category":"external","summary":"CVE-2021-4456","url":"https://www.suse.com/security/cve/CVE-2021-4456"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1259024 for CVE-2021-4456","url":"https://bugzilla.suse.com/1259024"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Package Hub 15 SP7:perl-Net-CIDR-0.270.0-bp157.2.3.1","openSUSE Leap 16.0:perl-Net-CIDR-0.270.0-bp160.1.1","openSUSE Tumbleweed:perl-Net-CIDR-0.270.0-2.1"]},{"category":"no_fix_planned","details":"There is no fix planned for these products.\n","product_ids":["SUSE Linux Enterprise Desktop 15 SP7:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP1:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP2:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP3:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP4:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise High Performance Computing 15 SP5:perl-Net-CIDR-Lite","SUSE Linux Enterprise Module for Development Tools 15 SP7:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP1-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP1:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP2-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP2:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP3-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP3:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP4-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP4:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP5-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP5:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP6-LTSS:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP6:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server 15 SP7:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server Teradata 15 SP4:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP1:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP2:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP3:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP4:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP4:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP5:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP5:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP6:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP6:perl-Net-CIDR-Lite","SUSE Linux Enterprise Server for SAP Applications 15 SP7:perl-Net-CIDR-Lite","openSUSE Leap 15.6:perl-Net-CIDR-Lite"]}],"scores":[{"cvss_v3":{"baseScore":8.2,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"products":["SUSE Package Hub 15 SP7:perl-Net-CIDR-0.270.0-bp157.2.3.1","openSUSE Leap 16.0:perl-Net-CIDR-0.270.0-bp160.1.1","openSUSE Tumbleweed:perl-Net-CIDR-0.270.0-2.1"]}],"threats":[{"category":"impact","date":"2026-02-27T03:03:01Z","details":"important"}],"title":"CVE-2021-4456"}]} |