{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"critical"},"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-2025-52556","title":"Title"},{"category":"description","text":"rfc3161-client is a Python library implementing the Time-Stamp Protocol (TSP) described in RFC 3161. Prior to version 1.0.3, there is a flaw in the timestamp response signature verification logic. In particular, chain verification is performed against the TSR's embedded certificates up to the trusted root(s), but fails to verify the TSR's own signature against the timestamping leaf certificates. Consequently, vulnerable versions perform insufficient signature validation to properly consider a TSR verified, as the attacker can introduce any TSR signature so long as the embedded leaf chains up to some root TSA. This issue has been patched in version 1.0.3. There is no workaround for this issue.","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-2025-52556","url":"https://www.suse.com/security/cve/CVE-2025-52556"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1245174 for CVE-2025-52556","url":"https://bugzilla.suse.com/1245174"}],"title":"SUSE CVE CVE-2025-52556","tracking":{"current_release_date":"2025-07-07T23:21:54Z","generator":{"date":"2025-06-23T23:20:56Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2025-52556","initial_release_date":"2025-06-23T23:20:56Z","revision_history":[{"date":"2025-06-23T23:20:56Z","number":"2","summary":"Current version"},{"date":"2025-06-25T13:44:01Z","number":"3","summary":"Current version"},{"date":"2025-06-27T23:21:43Z","number":"4","summary":"Current version"},{"date":"2025-07-04T14:36:37Z","number":"5","summary":"Current version"},{"date":"2025-07-07T23:21:54Z","number":"6","summary":"Current version"}],"status":"interim","version":"6"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"openSUSE Tumbleweed","product":{"name":"openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed","product_identification_helper":{"cpe":"cpe:/o:opensuse:tumbleweed"}}},{"category":"product_version","name":"python311-rfc3161-client-1.0.3-1.1","product":{"name":"python311-rfc3161-client-1.0.3-1.1","product_id":"python311-rfc3161-client-1.0.3-1.1","product_identification_helper":{"purl":"pkg:rpm/suse/python311-rfc3161-client@1.0.3-1.1"}}},{"category":"product_version","name":"python312-rfc3161-client-1.0.3-1.1","product":{"name":"python312-rfc3161-client-1.0.3-1.1","product_id":"python312-rfc3161-client-1.0.3-1.1","product_identification_helper":{"purl":"pkg:rpm/suse/python312-rfc3161-client@1.0.3-1.1"}}},{"category":"product_version","name":"python313-rfc3161-client-1.0.3-1.1","product":{"name":"python313-rfc3161-client-1.0.3-1.1","product_id":"python313-rfc3161-client-1.0.3-1.1","product_identification_helper":{"purl":"pkg:rpm/suse/python313-rfc3161-client@1.0.3-1.1"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"python311-rfc3161-client-1.0.3-1.1 as component of openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed:python311-rfc3161-client-1.0.3-1.1"},"product_reference":"python311-rfc3161-client-1.0.3-1.1","relates_to_product_reference":"openSUSE Tumbleweed"},{"category":"default_component_of","full_product_name":{"name":"python312-rfc3161-client-1.0.3-1.1 as component of openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed:python312-rfc3161-client-1.0.3-1.1"},"product_reference":"python312-rfc3161-client-1.0.3-1.1","relates_to_product_reference":"openSUSE Tumbleweed"},{"category":"default_component_of","full_product_name":{"name":"python313-rfc3161-client-1.0.3-1.1 as component of openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed:python313-rfc3161-client-1.0.3-1.1"},"product_reference":"python313-rfc3161-client-1.0.3-1.1","relates_to_product_reference":"openSUSE Tumbleweed"}]},"vulnerabilities":[{"cve":"CVE-2025-52556","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2025-52556"}],"notes":[{"category":"general","text":"rfc3161-client is a Python library implementing the Time-Stamp Protocol (TSP) described in RFC 3161. Prior to version 1.0.3, there is a flaw in the timestamp response signature verification logic. In particular, chain verification is performed against the TSR's embedded certificates up to the trusted root(s), but fails to verify the TSR's own signature against the timestamping leaf certificates. Consequently, vulnerable versions perform insufficient signature validation to properly consider a TSR verified, as the attacker can introduce any TSR signature so long as the embedded leaf chains up to some root TSA. This issue has been patched in version 1.0.3. There is no workaround for this issue.","title":"CVE description"}],"product_status":{"recommended":["openSUSE Tumbleweed:python311-rfc3161-client-1.0.3-1.1","openSUSE Tumbleweed:python312-rfc3161-client-1.0.3-1.1","openSUSE Tumbleweed:python313-rfc3161-client-1.0.3-1.1"]},"references":[{"category":"external","summary":"CVE-2025-52556","url":"https://www.suse.com/security/cve/CVE-2025-52556"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1245174 for CVE-2025-52556","url":"https://bugzilla.suse.com/1245174"}],"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":["openSUSE Tumbleweed:python311-rfc3161-client-1.0.3-1.1","openSUSE Tumbleweed:python312-rfc3161-client-1.0.3-1.1","openSUSE Tumbleweed:python313-rfc3161-client-1.0.3-1.1"]}],"threats":[{"category":"impact","date":"2025-06-21T04:00:11Z","details":"critical"}],"title":"CVE-2025-52556"}]}