{"answers":{"affected":"It affects 16 products.","exploited":"There is no known exploitation of CVE-2021-25217 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-25217 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 26 May 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-25217 and fix it if it is affected.\n\nWhat it is: CVE-2021-25217 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 26 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-25217 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-2021-25217/ (Markdown: https://insights.sbomify.com/CVE-2021-25217/index.md)","id":"CVE-2021-25217","markdown":"https://insights.sbomify.com/CVE-2021-25217/index.md","name":"CVE-2021-25217","record":{"aliases":["ALPINE-CVE-2021-25217","AZL-6372","CLSA-2021-1623075541","CLSA-2021-1634922551","CLSA-2021-1635459208","DEBIAN-CVE-2021-25217","DLA-2674-1","GHSA-pf98-cx5w-r49r","MGASA-2021-0307","OESA-2021-1226","RHSA-2021:2357","RHSA-2021:2359","RHSA-2021:2405","RHSA-2021:2414","RHSA-2021:2415","RHSA-2021:2416","RHSA-2021:2418","RHSA-2021:2419","RHSA-2021:2420","RHSA-2021:2469","RLSA-2021:2359","SUSE-SU-2021:14740-1","SUSE-SU-2021:1822-1","SUSE-SU-2021:1841-1","UBUNTU-CVE-2021-25217","USN-4969-1","USN-4969-2","openSUSE-SU-2021:0834-1","openSUSE-SU-2021:1841-1"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ISC DHCP server","requires_auth":"none","summary":"A buffer overrun in ISC DHCP lease parsing allows attackers to crash the service or corrupt lease data, impacting network availability and integrity.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"isc","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"dhcp","vendor":"isc"},{"product":"ontap_select_deploy_administration_utility","vendor":"netapp"},{"product":"solidfire_\\\u0026_hci_management_node","vendor":"netapp"},{"product":"ruggedcom_rox_mx5000_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1400_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1500_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1501_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1510_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1511_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1512_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1524_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx1536_firmware","vendor":"siemens"},{"product":"ruggedcom_rox_rx5000_firmware","vendor":"siemens"},{"product":"sinec_ins","vendor":"siemens"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"In ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16, ISC DHCP 4.4.0 -\u003e 4.4.2 (Other branches of ISC DHCP (i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series) are beyond their End-of-Life (EOL) and no longer supported by ISC. From inspection it is clear that the defect is also present in releases from those series, but they have not been officially tested for the vulnerability), The outcome of encountering the defect while reading a lease that will trigger it varies, according to: the component being affected (i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when reading an improper lease, which could cause network connectivity problems for an affected system due to the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in lack of service to clients. Additionally, the offending lease and the lease immediately following it in the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not occur, but it is possible for the offending lease and the lease which immediately followed it to be improperly deleted.","ecosystems":["Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::computenode","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:enterprise_linux:8::baseos","Red Hat:rhel_aus:7.2::server","Red Hat:rhel_aus:7.3::server","Red Hat:rhel_aus:7.4::server","Red Hat:rhel_aus:7.6::server","Red Hat:rhel_e4s:7.4::server","Red Hat:rhel_e4s:7.6::server","Red Hat:rhel_els:6","Red Hat:rhel_eus:7.7::computenode","Red Hat:rhel_eus:7.7::server","Red Hat:rhel_eus:8.1::baseos","Red Hat:rhel_eus:8.2::baseos","Red Hat:rhel_tus:7.4::server","Red Hat:rhel_tus:7.6::server","Rocky Linux:8","SUSE:Enterprise Storage 6","SUSE:HPE Helion OpenStack 8","SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","SUSE:Linux Enterprise High Performance Computing 15-ESPOS","SUSE:Linux Enterprise High Performance Computing 15-LTSS","SUSE:Linux Enterprise Module for Basesystem 15 SP2","SUSE:Linux Enterprise Module for Basesystem 15 SP3","SUSE:Linux Enterprise Module for Server Applications 15 SP2","SUSE:Linux Enterprise Module for Server Applications 15 SP3","SUSE:Linux Enterprise Point of Sale 11 SP3","SUSE:Linux Enterprise Server 11 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP2-BCL","SUSE:Linux Enterprise Server 12 SP3-BCL","SUSE:Linux Enterprise Server 12 SP3-LTSS","SUSE:Linux Enterprise Server 12 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server 15 SP1-BCL","SUSE:Linux Enterprise Server 15 SP1-LTSS","SUSE:Linux Enterprise Server 15-LTSS","SUSE:Linux Enterprise Server for SAP Applications 12 SP3","SUSE:Linux Enterprise Server for SAP Applications 12 SP4","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15","SUSE:Linux Enterprise Server for SAP Applications 15 SP1","SUSE:Linux Enterprise Software Development Kit 12 SP5","SUSE:Manager Proxy 4.0","SUSE:Manager Retail Branch Server 4.0","SUSE:Manager Server 4.0","SUSE:OpenStack Cloud 8","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.2","openSUSE:Leap 15.3"],"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":"A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient","id":"CVE-2021-25217","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","netapp:ontap_select_deploy_administration_utility","netapp:solidfire_\\\u0026_hci_management_node"],"type":"memory_corruption","year":"2021"},"n_packages":158,"n_references":9,"next":{"headline":"Denial of service in BIND9","id":"CVE-2021-25218"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhclient","purl":"pkg:rpm/redhat/dhclient","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-common","purl":"pkg:rpm/redhat/dhcp-common","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-devel","purl":"pkg:rpm/redhat/dhcp-devel","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs","purl":"pkg:rpm/redhat/dhcp-libs","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-devel","purl":"pkg:rpm/redhat/dhcp-devel","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhclient","purl":"pkg:rpm/redhat/dhclient","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-common","purl":"pkg:rpm/redhat/dhcp-common","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-devel","purl":"pkg:rpm/redhat/dhcp-devel","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs","purl":"pkg:rpm/redhat/dhcp-libs","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhclient","purl":"pkg:rpm/redhat/dhclient","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-common","purl":"pkg:rpm/redhat/dhcp-common","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-devel","purl":"pkg:rpm/redhat/dhcp-devel","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["12:4.2.5-83.el7_9.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs","purl":"pkg:rpm/redhat/dhcp-libs","source":"RHSA-2021:2357"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-client","purl":"pkg:rpm/redhat/dhcp-client","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-client-debuginfo","purl":"pkg:rpm/redhat/dhcp-client-debuginfo","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-common","purl":"pkg:rpm/redhat/dhcp-common","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-debugsource","purl":"pkg:rpm/redhat/dhcp-debugsource","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs","purl":"pkg:rpm/redhat/dhcp-libs","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs-debuginfo","purl":"pkg:rpm/redhat/dhcp-libs-debuginfo","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-relay","purl":"pkg:rpm/redhat/dhcp-relay","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-relay-debuginfo","purl":"pkg:rpm/redhat/dhcp-relay-debuginfo","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-server","purl":"pkg:rpm/redhat/dhcp-server","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["12:4.3.6-44.el8_4.1"],"introduced":["0"],"last_affected":[],"package":"dhcp-server-debuginfo","purl":"pkg:rpm/redhat/dhcp-server-debuginfo","source":"RHSA-2021:2359"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhclient","purl":"pkg:rpm/redhat/dhclient","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhcp","purl":"pkg:rpm/redhat/dhcp","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhcp-common","purl":"pkg:rpm/redhat/dhcp-common","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhcp-debuginfo","purl":"pkg:rpm/redhat/dhcp-debuginfo","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhcp-devel","purl":"pkg:rpm/redhat/dhcp-devel","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.2::server","fixed":["12:4.2.5-42.el7_2.2"],"introduced":["0"],"last_affected":[],"package":"dhcp-libs","purl":"pkg:rpm/redhat/dhcp-libs","source":"RHSA-2021:2418"},{"ecosystem":"Red Hat:rhel_aus:7.3::server","fixed":["12:4.2.5-47.el7_3.2"],"introduced":["0"],"last_affected":[],"package":"dhclient","purl":"pkg:rpm/redhat/dhclient","source":"RHSA-2021:2415"}],"prev":{"headline":"A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack","id":"CVE-2021-25216"},"products":["ISC DHCP"],"published":"2021-05-26","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":"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":"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":"2024-09-16","vendors":["ISC"]},"summary":"A buffer overrun in ISC DHCP lease parsing allows attackers to crash the service or corrupt lease data, impacting network availability and integrity.","url":"https://insights.sbomify.com/CVE-2021-25217/"}