{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-29495 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-29495 is a medium-severity vulnerability in nim-lang security, published on 7 May 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-2021-29495 and fix it if it is affected.\n\nWhat it is: CVE-2021-29495 is a medium-severity vulnerability in nim-lang security, published on 7 May 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-2021-29495 in the wild and no public exploit code.\n\nAffected product: nim-lang security. 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-2021-29495/ (Markdown: https://insights.sbomify.com/CVE-2021-29495/index.md)","id":"CVE-2021-29495","markdown":"https://insights.sbomify.com/CVE-2021-29495/index.md","name":"CVE-2021-29495","record":{"aliases":["DEBIAN-CVE-2021-29495","GHSA-9vqv-2jj9-7mqr","UBUNTU-CVE-2021-29495"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nim standard library","requires_auth":"none","summary":"Nim's standard library HTTP client fails to validate SSL/TLS certificates by default, allowing man-in-the-middle attacks unless explicitly configured otherwise.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nim","vendor":"nim-lang"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"Nim is a statically typed compiled systems programming language. In Nim standard library before 1.4.2, httpClient SSL/TLS certificate verification was disabled by default. Users can upgrade to version 1.4.2 to receive a patch or, as a workaround, set \"verifyMode = CVerifyPeer\" as documented.","ecosystems":[],"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":"Nim stdlib httpClient does not validate peer certificates by default","id":"CVE-2021-29495","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Predictable SIF UUID Identifiers","id":"CVE-2021-29499"},"packages":[],"prev":{"headline":"Kennnyshiwa-cogs vulnerable to Remote Code Execution in Tickets Module","id":"CVE-2021-29493"},"products":["security"],"published":"2021-05-07","related":[{"cvss_score":9.8,"headline":"Other in n/a","id":"CVE-2020-15690","kev_date_added":null,"published":"2021-01-30"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2020-15692","kev_date_added":null,"published":"2020-08-14"},{"cvss_score":8.3,"headline":"Nimble arbitrary code execution for specially crafted package metadata","id":"CVE-2021-21372","kev_date_added":null,"published":"2021-03-26"},{"cvss_score":8.1,"headline":"Nimble fails to validate certificates due to insecure httpClient defaults","id":"CVE-2021-21374","kev_date_added":null,"published":"2021-03-26"},{"cvss_score":7.5,"headline":"Nimble falls back to insecure http url when fetching packages","id":"CVE-2021-21373","kev_date_added":null,"published":"2021-03-26"},{"cvss_score":7.5,"headline":"Other in n/a","id":"CVE-2020-15694","kev_date_added":null,"published":"2020-08-14"},{"cvss_score":6.5,"headline":"Other in n/a","id":"CVE-2020-15693","kev_date_added":null,"published":"2020-08-14"}],"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":["nim-lang"]},"summary":"Nim's standard library HTTP client fails to validate SSL/TLS certificates by default, allowing man-in-the-middle attacks unless explicitly configured otherwise.","url":"https://insights.sbomify.com/CVE-2021-29495/"}