{"id":"UBUNTU-CVE-2020-11100","details":"In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly causing remote code execution.","modified":"2026-02-04T03:58:18.021753Z","published":"2020-04-02T00:00:00Z","related":["USN-4321-1"],"upstream":["CVE-2020-11100"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-11100"},{"type":"REPORT","url":"https://www.mail-archive.com/haproxy@formilux.org/msg36877.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4321-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-11100"}],"affected":[{"package":{"name":"haproxy","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/haproxy@1.8.8-1ubuntu0.10?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.8-1ubuntu0.10"}]}],"versions":["1.7.9-1ubuntu1","1.7.9-1ubuntu2","1.8.4-1","1.8.7-1","1.8.8-1","1.8.8-1ubuntu0.1","1.8.8-1ubuntu0.2","1.8.8-1ubuntu0.3","1.8.8-1ubuntu0.4","1.8.8-1ubuntu0.6","1.8.8-1ubuntu0.7","1.8.8-1ubuntu0.8","1.8.8-1ubuntu0.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"haproxy","binary_version":"1.8.8-1ubuntu0.10"},{"binary_name":"vim-haproxy","binary_version":"1.8.8-1ubuntu0.10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11100.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}