{"answers":{"affected":"It affects 10 products.","exploited":"There is no known exploitation of CVE-2018-21247 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2018-21247 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 17 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-21247 and fix it if it is affected.\n\nWhat it is: CVE-2018-21247 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 17 Jun 2020. 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-2018-21247 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. 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-2018-21247/ (Markdown: https://insights.sbomify.com/CVE-2018-21247/index.md)","id":"CVE-2018-21247","markdown":"https://insights.sbomify.com/CVE-2018-21247/index.md","name":"CVE-2018-21247","record":{"aliases":["DEBIAN-CVE-2018-21247","GHSA-355f-mpqr-3mwv","UBUNTU-CVE-2018-21247"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"VNC server library","requires_auth":"none","summary":"An attacker can read uninitialized memory contents via the ConnectToRFBRepeater function in LibVNCServer, potentially exposing sensitive data.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"libvncserver","vendor":"libvnc_project"},{"product":"leap","vendor":"opensuse"},{"product":"simatic_itc1500_firmware","vendor":"siemens"},{"product":"simatic_itc1500_pro_firmware","vendor":"siemens"},{"product":"simatic_itc1900_firmware","vendor":"siemens"},{"product":"simatic_itc1900_pro_firmware","vendor":"siemens"},{"product":"simatic_itc2200_firmware","vendor":"siemens"},{"product":"simatic_itc2200_pro_firmware","vendor":"siemens"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-909","name":"Missing Initialization of Resource"}],"description":"An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.","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":"Information disclosure in n/a","id":"CVE-2018-21247","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","opensuse:leap"],"type":"information_disclosure","year":"2018"},"n_packages":0,"n_references":8,"next":{"headline":"Information disclosure in n/a","id":"CVE-2018-21248"},"packages":[],"prev":{"headline":"Caddy vulnerable to Authentication Bypass due to mishandling of TLS client authentication","id":"CVE-2018-21246"},"products":["n/a"],"published":"2020-06-17","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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":"2024-08-05","vendors":["n/a"]},"summary":"An attacker can read uninitialized memory contents via the ConnectToRFBRepeater function in LibVNCServer, potentially exposing sensitive data.","url":"https://insights.sbomify.com/CVE-2018-21247/"}