{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-28091 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-28091 is a high-severity vulnerability in Debian Debian Linux, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28091 and fix it if it is affected.\n\nWhat it is: CVE-2021-28091 is a high-severity vulnerability in Debian Debian Linux, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-28091 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-28091/ (Markdown: https://insights.sbomify.com/CVE-2021-28091/index.md)","id":"CVE-2021-28091","markdown":"https://insights.sbomify.com/CVE-2021-28091/index.md","name":"CVE-2021-28091","record":{"aliases":["ALSA-2021:4325","AZL-7255","DEBIAN-CVE-2021-28091","DLA-2684-1","DSA-4926-1","GHSA-5pxh-5p72-wvcm","RHSA-2021:2989","RHSA-2021:4325","RLSA-2021:4325","SUSE-SU-2021:2589-1","UBUNTU-CVE-2021-28091","USN-4974-1","openSUSE-SU-2021:1057-1","openSUSE-SU-2024:10909-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Lasso SAML library","requires_auth":"none","summary":"Attackers can bypass authentication by exploiting improper cryptographic signature verification in the Lasso library.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"lasso","vendor":"entrouvert"},{"product":"fedora","vendor":"fedoraproject"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.","ecosystems":["AlmaLinux:8","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::crb","Rocky Linux:8","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Software Development Kit 12 SP5","openSUSE:Leap 15.2","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Weak cryptography in n/a","id":"CVE-2021-28091","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora"],"type":"weak_cryptography","year":"2021"},"n_packages":28,"n_references":7,"next":{"headline":"Regular Expression Denial of Service (ReDoS)","id":"CVE-2021-28092"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/almalinux/lasso","source":"ALSA-2021:4325"},{"ecosystem":"AlmaLinux:8","fixed":["2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-devel","purl":"pkg:rpm/almalinux/lasso-devel","source":"ALSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/redhat/lasso","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-debuginfo","purl":"pkg:rpm/redhat/lasso-debuginfo","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-devel","purl":"pkg:rpm/redhat/lasso-devel","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-python","purl":"pkg:rpm/redhat/lasso-python","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/redhat/lasso","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-debuginfo","purl":"pkg:rpm/redhat/lasso-debuginfo","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-devel","purl":"pkg:rpm/redhat/lasso-devel","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:2.5.1-8.el7_9"],"introduced":["0"],"last_affected":[],"package":"lasso-python","purl":"pkg:rpm/redhat/lasso-python","source":"RHSA-2021:2989"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"java-lasso-debuginfo","purl":"pkg:rpm/redhat/java-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/redhat/lasso","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-debuginfo","purl":"pkg:rpm/redhat/lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-debugsource","purl":"pkg:rpm/redhat/lasso-debugsource","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"perl-lasso-debuginfo","purl":"pkg:rpm/redhat/perl-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"python3-lasso-debuginfo","purl":"pkg:rpm/redhat/python3-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"java-lasso-debuginfo","purl":"pkg:rpm/redhat/java-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-debuginfo","purl":"pkg:rpm/redhat/lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-debugsource","purl":"pkg:rpm/redhat/lasso-debugsource","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso-devel","purl":"pkg:rpm/redhat/lasso-devel","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"perl-lasso-debuginfo","purl":"pkg:rpm/redhat/perl-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"python3-lasso-debuginfo","purl":"pkg:rpm/redhat/python3-lasso-debuginfo","source":"RHSA-2021:4325"},{"ecosystem":"Rocky Linux:8","fixed":["0:2.6.0-12.el8"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/rocky-linux/lasso?distro=rocky-linux-8-5-legacy\u0026epoch=0","source":"RLSA-2021:4325"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["2.6.1-8.7.2"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/suse/lasso\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:2589-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["2.6.1-8.7.2"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/suse/lasso\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:2589-1"},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","fixed":["2.6.1-8.7.2"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/suse/lasso\u0026distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5","source":"SUSE-SU-2021:2589-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["2.6.1-lp152.2.3.1"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/opensuse/lasso\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2021:1057-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["2.7.0-2.2"],"introduced":["0"],"last_affected":[],"package":"lasso","purl":"pkg:rpm/opensuse/lasso\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:10909-1"}],"prev":{"headline":"Denial of service in n/a","id":"CVE-2021-28090"},"products":["n/a"],"published":"2021-06-04","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can bypass authentication by exploiting improper cryptographic signature verification in the Lasso library.","url":"https://insights.sbomify.com/CVE-2021-28091/"}