{"answers":{"affected":"It affects 39 products.","exploited":"Yes. Attackers have exploited CVE-2023-4911 in the wild since at least 21 Nov 2023.","fix":"Apply the vendor's patch. US federal agencies must fix it by 12 Dec 2023.","what":"CVE-2023-4911 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 3 Oct 2023. 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-2023-4911 and fix it if it is affected.\n\nWhat it is: CVE-2023-4911 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 3 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2023-4911 in the wild since at least 21 Nov 2023.\n\nAffected product: Canonical Ubuntu 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-2023-4911/ (Markdown: https://insights.sbomify.com/CVE-2023-4911/index.md)","id":"CVE-2023-4911","markdown":"https://insights.sbomify.com/CVE-2023-4911/index.md","name":"CVE-2023-4911","record":{"aliases":["AZL-31117","AZL-34733","BELL-CVE-2023-4911","CLSA-2023-1698312626","DEBIAN-CVE-2023-4911","DSA-5514-1","GHSA-m77w-6vjw-wh2f","MGASA-2023-0286","MINI-5jjw-w7wp-vgf4","OESA-2023-1723","OESA-2023-1724","OESA-2023-1725","RHSA-2023:5454","RHSA-2023:5476","RHSA-2024:0033","UBUNTU-CVE-2023-4911","USN-6409-1","openSUSE-SU-2024:13294-1"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"GNU C Library","requires_auth":"low_privilege","summary":"A local attacker can exploit a buffer overflow in the dynamic loader to execute code with elevated privileges via malicious environment variables.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"glibc","vendor":"gnu"},{"product":"bootstrap_os","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410c_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"ontap_select_deploy_administration_utility","vendor":"netapp"},{"product":"codeready_linux_builder","vendor":"redhat"},{"product":"codeready_linux_builder_eus","vendor":"redhat"},{"product":"codeready_linux_builder_for_arm64","vendor":"redhat"},{"product":"codeready_linux_builder_for_arm64_eus","vendor":"redhat"},{"product":"codeready_linux_builder_for_ibm_z_systems","vendor":"redhat"},{"product":"codeready_linux_builder_for_ibm_z_systems_eus","vendor":"redhat"},{"product":"codeready_linux_builder_for_power_little_endian","vendor":"redhat"},{"product":"codeready_linux_builder_for_power_little_endian_eus","vendor":"redhat"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_eus","vendor":"redhat"},{"product":"enterprise_linux_for_arm_64","vendor":"redhat"},{"product":"enterprise_linux_for_arm_64_eus","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems_eus","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems_eus_s390x","vendor":"redhat"},{"product":"enterprise_linux_for_power_big_endian_eus","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian_eus","vendor":"redhat"},{"product":"enterprise_linux_server_aus","vendor":"redhat"},{"product":"enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","vendor":"redhat"},{"product":"enterprise_linux_server_tus","vendor":"redhat"},{"product":"enterprise_linux_update_services_for_sap_solutions","vendor":"redhat"},{"product":"virtualization","vendor":"redhat"},{"product":"virtualization_host","vendor":"redhat"},{"product":"simatic_s7-1500_cpu_1518-4_pn\\/dp_mfp_firmware","vendor":"siemens"},{"product":"simatic_s7-1500_cpu_1518f-4_pn\\/dp_mfp_firmware","vendor":"siemens"},{"product":"simatic_s7-1500_tm_mfp_firmware","vendor":"siemens"},{"product":"siplus_s7-1500_cpu_1518-4_pn\\/dp_mfp_firmware","vendor":"siemens"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.","ecosystems":["Red Hat:rhel_eus:8.6::appstream","Red Hat:rhel_eus:8.6::baseos","Red Hat:rhel_eus:8.6::crb","Red Hat:rhel_eus:9.0::appstream","Red Hat:rhel_eus:9.0::baseos","Red Hat:rhel_eus:9.0::crb","Red Hat:rhev_hypervisor:4.4::el8","openSUSE:Tumbleweed"],"exploits":{"exploitdb":1,"first_seen":"2023-10-03","github_poc":22,"max_poc_stars":393,"metasploit":1,"nuclei":0,"refs":[{"date":"2023-10-04T14:12:16Z","kind":"github_poc","ref":"https://github.com/leesh3288/CVE-2023-4911","stars":393,"title":"PoC for CVE-2023-4911"},{"date":"2023-10-04T14:32:49Z","kind":"github_poc","ref":"https://github.com/RickdeJager/CVE-2023-4911","stars":167,"title":"CVE-2023-4911 proof of concept"},{"date":"2023-10-17T07:44:16Z","kind":"github_poc","ref":"https://github.com/chaudharyarjun/LooneyPwner","stars":43,"title":"Exploit tool for CVE-2023-4911, targeting the 'Looney Tunables' glibc vulnerability in various Linux distributions."},{"date":"2023-10-10T22:04:23Z","kind":"github_poc","ref":"https://github.com/hadrian3689/looney-tunables-CVE-2023-4911","stars":29,"title":null},{"date":"2023-10-11T14:49:22Z","kind":"github_poc","ref":"https://github.com/ruycr4ft/CVE-2023-4911","stars":19,"title":"CVE-2023-4911"},{"date":"2023-10-25T11:59:34Z","kind":"github_poc","ref":"https://github.com/KernelKrise/CVE-2023-4911","stars":18,"title":"Looney Tunables Local privilege escalation (CVE-2023-4911) workshop"},{"date":"2023-10-04T11:58:58Z","kind":"github_poc","ref":"https://github.com/Green-Avocado/CVE-2023-4911","stars":15,"title":"https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt"},{"date":"2023-10-28T20:05:30Z","kind":"github_poc","ref":"https://github.com/Diego-AltF4/CVE-2023-4911","stars":8,"title":"Proof of concept for CVE-2023-4911 (Looney Tunables) discovered by Qualys Threat Research Unit "}],"tier":"exploited"},"has_fix":true,"headline":"GNU C Library Buffer Overflow","id":"CVE-2023-4911","indexable":true,"kev":{"dateAdded":"2023-11-21","dueDate":"2023-12-12","knownRansomwareCampaignUse":"Unknown","product":"GNU C Library","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","vendorProject":"GNU","vulnerabilityName":"GNU C Library Buffer Overflow Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","gnu:glibc","netapp:bootstrap_os","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware","netapp:ontap_select_deploy_administration_utility","redhat:enterprise_linux","redhat:enterprise_linux_eus","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_ibm_z_systems_eus","redhat:enterprise_linux_for_power_little_endian","redhat:enterprise_linux_for_power_little_endian_eus","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","redhat:enterprise_linux_server_tus","redhat:virtualization","redhat:virtualization_host"],"type":"memory_corruption","year":"2023"},"n_packages":507,"n_references":9,"next":{"headline":"Allocation of Resources Without Limits or Throttling in GitLab","id":"CVE-2023-4912"},"packages":[{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"compat-libpthread-nonshared","purl":"pkg:rpm/redhat/compat-libpthread-nonshared","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-benchtests-debuginfo","purl":"pkg:rpm/redhat/glibc-benchtests-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-common-debuginfo","purl":"pkg:rpm/redhat/glibc-common-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-debuginfo","purl":"pkg:rpm/redhat/glibc-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red 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Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"libnsl-debuginfo","purl":"pkg:rpm/redhat/libnsl-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"nscd-debuginfo","purl":"pkg:rpm/redhat/nscd-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"nss_db-debuginfo","purl":"pkg:rpm/redhat/nss_db-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::appstream","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"nss_hesiod-debuginfo","purl":"pkg:rpm/redhat/nss_hesiod-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red 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Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-doc","purl":"pkg:rpm/redhat/glibc-doc","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-gconv-extra","purl":"pkg:rpm/redhat/glibc-gconv-extra","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-gconv-extra-debuginfo","purl":"pkg:rpm/redhat/glibc-gconv-extra-debuginfo","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-headers","purl":"pkg:rpm/redhat/glibc-headers","source":"RHSA-2023:5476"},{"ecosystem":"Red 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Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-am","purl":"pkg:rpm/redhat/glibc-langpack-am","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-an","purl":"pkg:rpm/redhat/glibc-langpack-an","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-anp","purl":"pkg:rpm/redhat/glibc-langpack-anp","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-ar","purl":"pkg:rpm/redhat/glibc-langpack-ar","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-as","purl":"pkg:rpm/redhat/glibc-langpack-as","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-ast","purl":"pkg:rpm/redhat/glibc-langpack-ast","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-ayc","purl":"pkg:rpm/redhat/glibc-langpack-ayc","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-az","purl":"pkg:rpm/redhat/glibc-langpack-az","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-be","purl":"pkg:rpm/redhat/glibc-langpack-be","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-bem","purl":"pkg:rpm/redhat/glibc-langpack-bem","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-ber","purl":"pkg:rpm/redhat/glibc-langpack-ber","source":"RHSA-2023:5476"},{"ecosystem":"Red Hat:rhel_eus:8.6::baseos","fixed":["0:2.28-189.6.el8_6"],"introduced":["0"],"last_affected":[],"package":"glibc-langpack-bg","purl":"pkg:rpm/redhat/glibc-langpack-bg","source":"RHSA-2023:5476"}],"prev":{"headline":"3scale-admin-portal: logged out users tokens can be accessed","id":"CVE-2023-4910"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.6 Extended Update Support","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.0 Extended Update Support","Red Hat Virtualization 4 for Red Hat Enterprise Linux 8"],"published":"2023-10-03","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["Red Hat"]},"summary":"A local attacker can exploit a buffer overflow in the dynamic loader to execute code with elevated privileges via malicious environment variables.","url":"https://insights.sbomify.com/CVE-2023-4911/"}