{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34451 exists.","fix":"Apply the vendor's patch.","what":"CVE-2025-34451 is a medium-severity memory corruption vulnerability in rofl0r proxychains-ng, published on 18 Dec 2025. 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-2025-34451 and fix it if it is affected.\n\nWhat it is: CVE-2025-34451 is a medium-severity memory corruption vulnerability in rofl0r proxychains-ng, published on 18 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34451 exists.\n\nAffected product: rofl0r proxychains-ng. 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-2025-34451/ (Markdown: https://insights.sbomify.com/CVE-2025-34451/index.md)","id":"CVE-2025-34451","markdown":"https://insights.sbomify.com/CVE-2025-34451/index.md","name":"CVE-2025-34451","record":{"aliases":["DEBIAN-CVE-2025-34451","GHSA-8qj4-vcg9-jq63","UBUNTU-CVE-2025-34451"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"proxychains-ng library","requires_auth":"none","summary":"A stack-based buffer overflow in proxychains-ng allows attackers to cause denial of service or potentially execute code via crafted proxy configuration entries.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"proxychains-ng","vendor":"proxychains-ng_project"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"rofl0r/proxychains-ng versions up to and including 4.17 and prior to commit cc005b7 contain a stack-based buffer overflow vulnerability in the function proxy_from_string() located in src/libproxychains.c. When parsing crafted proxy configuration entries containing overly long username or password fields, the application may write beyond the bounds of fixed-size stack buffers, leading to memory corruption or crashes. This vulnerability may allow denial of service and, under certain conditions, could be leveraged for further exploitation depending on the execution environment and applied mitigations.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"rofl0r/proxychains-ng \u003c= 4.17 Stack-based Buffer Overflow","id":"CVE-2025-34451","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"Streama Subtitle Download Path Traversal and SSRF Leading to Arbitrary File Write","id":"CVE-2025-34452"},"packages":[],"prev":{"headline":"merbanan/rtl_433 \u003c= 25.02 Stack-based Buffer Overflow","id":"CVE-2025-34450"},"products":["proxychains-ng"],"published":"2025-12-18","related":[{"cvss_score":7.8,"headline":"Privilege escalation in n/a","id":"CVE-2015-3887","kev_date_added":null,"published":"2017-09-21"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-14","vendors":["rofl0r"]},"summary":"A stack-based buffer overflow in proxychains-ng allows attackers to cause denial of service or potentially execute code via crafted proxy configuration entries.","url":"https://insights.sbomify.com/CVE-2025-34451/"}