{"answers":{"affected":"13 open source packages ship an affected version, including nix. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-45707 in the wild and no public exploit code.","fix":"Upgrade nix to a fixed version for your release line: 0.20.2, 0.21.2, 0.22.2 or 0.23.0.","what":"CVE-2021-45707 is a critical memory corruption vulnerability in n/a, published on 26 Dec 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-2021-45707 and fix it if it is affected.\n\nWhat it is: CVE-2021-45707 is a critical memory corruption vulnerability in n/a, published on 26 Dec 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-2021-45707 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nix (crates.io): affected from 0.16.0; fixed in 0.20.2, 0.21.2, 0.22.2, 0.23.0\n- nix (crates.io): affected from 0.16.0; fixed in 0.20.2\n- nix (crates.io): affected from 0.16.0; fixed in 0.20.2\n- nix (crates.io): affected from 0.16.0; fixed in 0.20.2\n- nix (crates.io): affected from 0.16.0; fixed in 0.20.2\n- nix (crates.io): affected from 0.21.0; fixed in 0.21.2\n- nix (crates.io): affected from 0.21.0; fixed in 0.21.2\n- nix (crates.io): affected from 0.21.0; fixed in 0.21.2\n- nix (crates.io): affected from 0.21.0; fixed in 0.21.2\n- nix (crates.io): affected from 0.22.0; fixed in 0.22.2\n- nix (crates.io): affected from 0.22.0; fixed in 0.22.2\n- nix (crates.io): affected from 0.22.0; fixed in 0.22.2\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-2021-45707/ (Markdown: https://insights.sbomify.com/CVE-2021-45707/index.md)","id":"CVE-2021-45707","markdown":"https://insights.sbomify.com/CVE-2021-45707/index.md","name":"CVE-2021-45707","record":{"aliases":["DEBIAN-CVE-2021-45707","GHSA-76w9-p8mg-j927","GHSA-wgrg-5h56-jg27","RUSTSEC-2021-0119","UBUNTU-CVE-2021-45707"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust nix crate","requires_auth":"none","summary":"An out-of-bounds write in the nix crate allows attackers to cause memory corruption or denial of service when processing users with many groups.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"nix","vendor":"nix_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"An issue was discovered in the nix crate 0.16.0 and later before 0.20.2, 0.21.x before 0.21.2, and 0.22.x before 0.22.2 for Rust. unistd::getgrouplist has an out-of-bounds write if a user is in more than 16 /etc/groups groups.","ecosystems":["crates.io"],"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":"Out-of-bounds Write in nix","id":"CVE-2021-45707","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":13,"n_references":3,"next":{"headline":"Abomonation transmutes \u0026T to and from \u0026[u8] without sufficient constraints","id":"CVE-2021-45708"},"packages":[{"ecosystem":"crates.io","fixed":["0.20.2","0.21.2","0.22.2","0.23.0"],"introduced":["0.16.0","0.21.0-0","0.22.0-0","0.23.0-0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"RUSTSEC-2021-0119"},{"ecosystem":"crates.io","fixed":["0.20.2"],"introduced":["0.16.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.20.2"],"introduced":["0.16.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.20.2"],"introduced":["0.16.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-wgrg-5h56-jg27"},{"ecosystem":"crates.io","fixed":["0.20.2"],"introduced":["0.16.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-wgrg-5h56-jg27"},{"ecosystem":"crates.io","fixed":["0.21.2"],"introduced":["0.21.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.21.2"],"introduced":["0.21.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.21.2"],"introduced":["0.21.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-wgrg-5h56-jg27"},{"ecosystem":"crates.io","fixed":["0.21.2"],"introduced":["0.21.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-wgrg-5h56-jg27"},{"ecosystem":"crates.io","fixed":["0.22.2"],"introduced":["0.22.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.22.2"],"introduced":["0.22.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-76w9-p8mg-j927"},{"ecosystem":"crates.io","fixed":["0.22.2"],"introduced":["0.22.0"],"last_affected":[],"package":"nix","purl":null,"source":"GHSA-wgrg-5h56-jg27"},{"ecosystem":"crates.io","fixed":["0.22.2"],"introduced":["0.22.0"],"last_affected":[],"package":"nix","purl":"pkg:cargo/nix","source":"GHSA-wgrg-5h56-jg27"}],"prev":{"headline":"Memory flaw in zeroize_derive","id":"CVE-2021-45706"},"products":["n/a"],"published":"2021-12-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"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":"2024-08-04","vendors":["n/a"]},"summary":"An out-of-bounds write in the nix crate allows attackers to cause memory corruption or denial of service when processing users with many groups.","url":"https://insights.sbomify.com/CVE-2021-45707/"}