{"id":"UBUNTU-CVE-2021-28678","details":"An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.","modified":"2026-04-02T18:31:53.119998Z","published":"2021-05-10T00:00:00Z","related":["USN-4963-1"],"upstream":["CVE-2021-28678"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28678"},{"type":"REPORT","url":"https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28678-fix-blp-dos"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4963-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-28678"}],"affected":[{"package":{"name":"pillow","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/pillow@5.1.0-1ubuntu0.6?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.0-1ubuntu0.6"}]}],"versions":["4.1.1-3build2","4.3.0-2ubuntu1","5.0.0-1","5.1.0-1","5.1.0-1ubuntu0.2","5.1.0-1ubuntu0.3","5.1.0-1ubuntu0.4","5.1.0-1ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_version":"5.1.0-1ubuntu0.6","binary_name":"python-pil"},{"binary_version":"5.1.0-1ubuntu0.6","binary_name":"python-pil.imagetk"},{"binary_version":"5.1.0-1ubuntu0.6","binary_name":"python3-pil"},{"binary_version":"5.1.0-1ubuntu0.6","binary_name":"python3-pil.imagetk"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28678.json"}},{"package":{"name":"pillow","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pillow@7.0.0-4ubuntu0.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-4ubuntu0.4"}]}],"versions":["6.1.0-1","6.1.0-1build1","6.2.1-2","7.0.0-4","7.0.0-4build1","7.0.0-4ubuntu0.1","7.0.0-4ubuntu0.2","7.0.0-4ubuntu0.3"],"ecosystem_specific":{"binaries":[{"binary_version":"7.0.0-4ubuntu0.4","binary_name":"python3-pil"},{"binary_version":"7.0.0-4ubuntu0.4","binary_name":"python3-pil.imagetk"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28678.json"}},{"package":{"name":"pillow-python2","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/pillow-python2@6.2.1-3ubuntu0.1~esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.2.1-3~build1","6.2.1-3","6.2.1-3ubuntu0.1~esm1","6.2.1-3ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"6.2.1-3ubuntu0.1~esm2","binary_name":"python-pil"},{"binary_version":"6.2.1-3ubuntu0.1~esm2","binary_name":"python-pil.imagetk"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28678.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}