{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-4877 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-4877 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 20 Aug 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-2025-4877 and fix it if it is affected.\n\nWhat it is: CVE-2025-4877 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 20 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-4877 in the wild and no public exploit code.\n\nAffected product: Red Hat Enterprise Linux 10. 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-2025-4877/ (Markdown: https://insights.sbomify.com/CVE-2025-4877/index.md)","id":"CVE-2025-4877","markdown":"https://insights.sbomify.com/CVE-2025-4877/index.md","name":"CVE-2025-4877","record":{"aliases":["BELL-CVE-2025-4877","DEBIAN-CVE-2025-4877","GHSA-pwrf-jm93-99r3","UBUNTU-CVE-2025-4877"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"libssh library","requires_auth":"low_privilege","summary":"An integer overflow in libssh's base64 conversion can cause heap corruption and potential code execution on 32-bit systems.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":4.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption.\nThis issue affects only 32-bits builds of libssh.","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":"Libssh: write beyond bounds in binary to base64 conversion functions","id":"CVE-2025-4877","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"Libssh: use of uninitialized variable in privatekey_from_file()","id":"CVE-2025-4878"},"packages":[],"prev":{"headline":"Hardcoded Key Revealed in ConnectWise Password Encryption Utility","id":"CVE-2025-4876"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat OpenShift Container Platform 4"],"published":"2025-08-20","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-31","vendors":["Red Hat"]},"summary":"An integer overflow in libssh's base64 conversion can cause heap corruption and potential code execution on 32-bit systems.","url":"https://insights.sbomify.com/CVE-2025-4877/"}