{"id":"USN-5138-1","summary":"python-py vulnerability","details":"\nThe py.path.svnwc component of py (aka python-py) through v1.9.0 contains \na regular expression with an ambiguous subpattern that is susceptible to \ncatastrophic backtracing. This could be used by attackers to cause a compute-time \ndenial of service attack by supplying malicious input to the blame functionality.\n\n","modified":"2026-04-27T15:57:14.987242Z","published":"2021-11-10T22:09:54Z","related":["UBUNTU-CVE-2020-29651"],"upstream":["CVE-2020-29651","UBUNTU-CVE-2020-29651"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5138-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-29651"}],"affected":[{"package":{"name":"python-py","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-py@1.5.2-1ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.2-1ubuntu0.1"}]}],"versions":["1.4.34-2ubuntu1","1.4.34-3","1.5.2-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"pypy-py","binary_version":"1.5.2-1ubuntu0.1"},{"binary_name":"python-py","binary_version":"1.5.2-1ubuntu0.1"},{"binary_name":"python3-py","binary_version":"1.5.2-1ubuntu0.1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2020-29651","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5138-1.json"}},{"package":{"name":"python-py","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/python-py@1.8.1-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1-1ubuntu0.1"}]}],"versions":["1.8.0-1","1.8.0-1build2","1.8.1-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"pypy-py","binary_version":"1.8.1-1ubuntu0.1"},{"binary_name":"python-py","binary_version":"1.8.1-1ubuntu0.1"},{"binary_name":"python3-py","binary_version":"1.8.1-1ubuntu0.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2020-29651","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5138-1.json"}}],"schema_version":"1.7.5"}