{"answers":{"affected":"3 open source packages ship an affected version, including rsa. It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-13757 in the wild and no public exploit code.","fix":"Upgrade rsa to 4.1 or later.","what":"CVE-2020-13757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 1 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-2020-13757 and fix it if it is affected.\n\nWhat it is: CVE-2020-13757 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 1 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-2020-13757 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rsa (PyPI): affected all versions; fixed in 4.1\n- rsa (PyPI): affected all versions; fixed in 4.1\n- rsa (PyPI): affected all versions; fixed in 4.1\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-2020-13757/ (Markdown: https://insights.sbomify.com/CVE-2020-13757/index.md)","id":"CVE-2020-13757","markdown":"https://insights.sbomify.com/CVE-2020-13757/index.md","name":"CVE-2020-13757","record":{"aliases":["DEBIAN-CVE-2020-13757","GHSA-537h-rv9q-vvph","MGASA-2020-0364","PYSEC-2020-99","SUSE-SU-2021:2008-1","SUSE-SU-2021:2237-1","SUSE-SU-2021:2253-1","SUSE-SU-2022:3287-1","UBUNTU-CVE-2020-13757","USN-4478-1","USN-4478-2","openSUSE-SU-2021:0901-1","openSUSE-SU-2021:2008-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Python RSA library","requires_auth":"none","summary":"An attacker can cause excessive memory allocation or infer library usage by exploiting improper handling of leading null bytes during RSA decryption.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"fedora","vendor":"fedoraproject"},{"product":"python-rsa","vendor":"python-rsa_project"}],"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-327","name":"Use of a Broken or Risky Cryptographic Algorithm"}],"description":"Python-RSA before 4.1 ignores leading '\\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).","ecosystems":["PyPI","SUSE:Enterprise Storage 6","SUSE:HPE Helion OpenStack 8","SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","SUSE:Linux Enterprise Module for Basesystem 15 SP2","SUSE:Linux Enterprise Module for Basesystem 15 SP3","SUSE:Linux Enterprise Module for Package Hub 15 SP2","SUSE:Linux Enterprise Module for Package Hub 15 SP3","SUSE:Linux Enterprise Module for Public Cloud 12","SUSE:Linux Enterprise Module for Public Cloud 15","SUSE:Linux Enterprise Server 15 SP1-BCL","SUSE:Linux Enterprise Server 15 SP1-LTSS","SUSE:Linux Enterprise Server for SAP Applications 15 SP1","SUSE:Manager Proxy 4.0","SUSE:Manager Retail Branch Server 4.0","SUSE:Manager Server 4.0","SUSE:OpenStack Cloud 7","SUSE:OpenStack Cloud 8","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.2","openSUSE:Leap 15.3"],"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":"Python-RSA decryption of ciphertext leads to DoS","id":"CVE-2020-13757","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","fedoraproject:fedora"],"type":"weak_cryptography","year":"2020"},"n_packages":26,"n_references":5,"next":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-13758"},"packages":[{"ecosystem":"PyPI","fixed":["4.1"],"introduced":["0"],"last_affected":[],"package":"rsa","purl":null,"source":"GHSA-537h-rv9q-vvph"},{"ecosystem":"PyPI","fixed":["4.1"],"introduced":["0"],"last_affected":[],"package":"rsa","purl":"pkg:pypi/rsa","source":"GHSA-537h-rv9q-vvph"},{"ecosystem":"PyPI","fixed":["4.1"],"introduced":["0"],"last_affected":[],"package":"rsa","purl":"pkg:pypi/rsa","source":"PYSEC-2020-99"},{"ecosystem":"SUSE:Enterprise Storage 6","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Enterprise%20Storage%206","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:HPE Helion OpenStack 8","fixed":["3.4.2-3.3.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=HPE%20Helion%20OpenStack%208","source":"SUSE-SU-2022:3287-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP2","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP2","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP3","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP3","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Public Cloud 12","fixed":["3.1.4-12.16.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012","source":"SUSE-SU-2021:2237-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Public Cloud 15","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Manager Proxy 4.0","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Manager%20Proxy%204.0","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Manager Retail Branch Server 4.0","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:Manager Server 4.0","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20Manager%20Server%204.0","source":"SUSE-SU-2021:2008-1"},{"ecosystem":"SUSE:OpenStack Cloud 7","fixed":["3.1.4-12.16.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20OpenStack%20Cloud%207","source":"SUSE-SU-2021:2237-1"},{"ecosystem":"SUSE:OpenStack Cloud 8","fixed":["3.4.2-3.3.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20OpenStack%20Cloud%208","source":"SUSE-SU-2022:3287-1"},{"ecosystem":"SUSE:OpenStack Cloud 9","fixed":["3.4.2-4.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20OpenStack%20Cloud%209","source":"SUSE-SU-2021:2253-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 8","fixed":["3.4.2-3.3.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%208","source":"SUSE-SU-2022:3287-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["3.4.2-4.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/suse/python-rsa\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2021:2253-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["3.4.2-lp152.4.3.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/opensuse/python-rsa\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2021:0901-1"},{"ecosystem":"openSUSE:Leap 15.3","fixed":["3.4.2-3.4.1"],"introduced":["0"],"last_affected":[],"package":"python-rsa","purl":"pkg:rpm/opensuse/python-rsa\u0026distro=openSUSE%20Leap%2015.3","source":"openSUSE-SU-2021:2008-1"}],"prev":{"headline":"Sabberworm PHP CSS Parser Code injection vulnerability in allSelectors()","id":"CVE-2020-13756"},"products":["n/a"],"published":"2020-06-01","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":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":["n/a"]},"summary":"An attacker can cause excessive memory allocation or infer library usage by exploiting improper handling of leading null bytes during RSA decryption.","url":"https://insights.sbomify.com/CVE-2020-13757/"}