{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-43844 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-43844 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-43844 is a high-severity vulnerability in rcmaehl MSEdgeRedirect, published on 20 Dec 2021."},"fix_prompt":"Check this codebase for CVE-2021-43844 and fix it if it is affected.\n\nWhat it is: CVE-2021-43844 is a high-severity vulnerability in rcmaehl MSEdgeRedirect, published on 20 Dec 2021. \nExploitation: There is no known exploitation of CVE-2021-43844 in the wild and no public exploit code.\n\nAffected product: rcmaehl MSEdgeRedirect. 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-2021-43844/ (Markdown: https://insights.sbomify.com/CVE-2021-43844/index.md)","id":"CVE-2021-43844","markdown":"https://insights.sbomify.com/CVE-2021-43844/index.md","name":"CVE-2021-43844","record":{"aliases":["GHSA-95v4-748v-fmf9"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[{"product":"msedgeredirect","vendor":"msedgeredirect_project"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-610","name":"Externally Controlled Reference to a Resource in Another Sphere"}],"description":"MSEdgeRedirect is a tool to redirect news, search, widgets, weather, and more to a user's default browser. MSEdgeRedirect versions before 0.5.0.1 are vulnerable to Remote Code Execution via specifically crafted URLs. This vulnerability requires user interaction and the acceptance of a prompt. With how MSEdgeRedirect is coded, parameters are impossible to pass to any launched file. However, there are two possible scenarios in which an attacker can do more than a minor annoyance. In Scenario 1 (confirmed), a user visits an attacker controlled webpage; the user is prompted with, and downloads, an executable payload; the user is prompted with, and accepts, the aforementioned crafted URL prompt; and RCE executes the payload the user previously downloaded, if the download path is successfully guessed. In Scenario 2 (not yet confirmed), a user visits an attacked controlled webpage; the user is prompted with, and accepts, the aforementioned crafted URL prompt; and a payload on a remote, attacker controlled, SMB server is executed. The issue was found in the _DecodeAndRun() function, in which I incorrectly assumed _WinAPI_UrlIs() would only accept web resources. Unfortunately, file:/// passes the default _WinAPI_UrlIs check(). File paths are now directly checked for and must fail. There is no currently known exploitation of this vulnerability in the wild. A patched version, 0.5.0.1, has been released that checks for and denies these crafted URLs. There are no workarounds for this issue. Users are advised not to accept any unexpected prompts from web pages.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Externally Controlled Reference to a Resource in Another Sphere in MSEdgeRedirect","id":"CVE-2021-43844","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Prevent out-of-bounds read in PJSIP","id":"CVE-2021-43845"},"packages":[],"prev":{"headline":"Insufficient patch for Regular Expression Denial of Service (ReDoS) to jsx-slack v4.5.1","id":"CVE-2021-43843"},"products":["MSEdgeRedirect"],"published":"2021-12-20","related":[],"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":"2024-08-04","vendors":["rcmaehl"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2021-43844/"}