{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21798 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21798 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21798 is a high-severity use after free vulnerability in Nitro Pro, published on 15 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-21798 and fix it if it is affected.\n\nWhat it is: CVE-2021-21798 is a high-severity use after free vulnerability in Nitro Pro, published on 15 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-21798 in the wild and no public exploit code.\n\nAffected product: Nitro Pro. 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-2021-21798/ (Markdown: https://insights.sbomify.com/CVE-2021-21798/index.md)","id":"CVE-2021-21798","markdown":"https://insights.sbomify.com/CVE-2021-21798/index.md","name":"CVE-2021-21798","record":{"aliases":["GHSA-4vm8-m2w2-wpqm"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"PDF reader","requires_auth":"none","summary":"A use-after-free vulnerability in Nitro Pro PDF allows attackers to execute arbitrary code by tricking users into opening a specially crafted document.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"nitro_pro","vendor":"gonitro"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-562","name":"Return of Stack Variable Address"}],"description":"An exploitable return of stack variable address vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a stack variable to go out of scope, resulting in the application dereferencing a stale pointer. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger the vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Use after free in Nitro Pro","id":"CVE-2021-21798","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21799"},"packages":[],"prev":{"headline":"Use after free in Nitro Pro","id":"CVE-2021-21797"},"products":["Nitro Pro"],"published":"2021-09-15","related":[{"cvss_score":8.8,"headline":"Use after free in Nitro Pro","id":"CVE-2021-21796","kev_date_added":null,"published":"2021-10-18"},{"cvss_score":8.8,"headline":"Use after free in Nitro Pro","id":"CVE-2021-21797","kev_date_added":null,"published":"2021-10-18"},{"cvss_score":8.8,"headline":"Memory corruption in Nitro Pro","id":"CVE-2020-6112","kev_date_added":null,"published":"2020-09-17"},{"cvss_score":8.8,"headline":"Integer overflow in Nitro Pro","id":"CVE-2020-6113","kev_date_added":null,"published":"2020-09-17"},{"cvss_score":8.8,"headline":"Use after free in Nitro Pro","id":"CVE-2020-6115","kev_date_added":null,"published":"2020-09-17"},{"cvss_score":8.8,"headline":"Memory corruption in Nitro Pro","id":"CVE-2020-6116","kev_date_added":null,"published":"2020-09-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"A use-after-free vulnerability in Nitro Pro PDF allows attackers to execute arbitrary code by tricking users into opening a specially crafted document.","url":"https://insights.sbomify.com/CVE-2021-21798/"}