{"id":"CVE-2020-1921","details":"In the crypt function, we attempt to null terminate a buffer using the size of the input salt without validating that the offset is within the buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.","modified":"2026-04-11T12:40:11.972541Z","published":"2021-03-10T16:15:14.547Z","references":[{"type":"ADVISORY","url":"https://hhvm.com/blog/2021/02/25/security-update.html"},{"type":"FIX","url":"https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/facebook/hhvm","events":[{"introduced":"0"},{"fixed":"1e8015b71d689f612ecf4995544a200d5c5617a3"},{"introduced":"ce87598e3c65a922a6e25c7119e2446f1fa6a4b6"},{"fixed":"79a132194e1b4c1d7cb374b7b8a2bb74f11d08bf"},{"introduced":"75407bf7bfdd694f18e2660c4e78aeeacb07b622"},{"fixed":"f1dfafe82316eb0cb9b4c430dc2949a18296fd1b"},{"introduced":"0"},{"last_affected":"510a8a05894483f0f398f380df8587a03d52bf2d"},{"introduced":"0"},{"last_affected":"f9a831b7130ca86233922048611e17bc2f074398"},{"introduced":"0"},{"last_affected":"ee92877f806fc0cebacda739efa1388042df0946"},{"introduced":"0"},{"last_affected":"99d4cfd6e82cea13306d4897d5da6076c943f975"},{"introduced":"0"},{"last_affected":"4cd5c1d9e75effa0dd1dd8a53dfd47c62111f956"},{"fixed":"08193b7f0cd3910256e00d599f0f3eb2519c44ca"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"4.56.3"},{"introduced":"4.57.0"},{"fixed":"4.80.2"},{"introduced":"4.81.0"},{"fixed":"4.93.2"},{"introduced":"0"},{"last_affected":"4.94.0"},{"introduced":"0"},{"last_affected":"4.95.0"},{"introduced":"0"},{"last_affected":"4.96.0"},{"introduced":"0"},{"last_affected":"4.97.0"},{"introduced":"0"},{"last_affected":"4.98.0"}]}}],"versions":["HHVM-4.56.0","HHVM-4.56.1","HHVM-4.56.2","HHVM-4.80.0","HHVM-4.80.1","HHVM-4.93.0","HHVM-4.93.1","HHVM-4.94.0","HHVM-4.95.0","HHVM-4.96.0","HHVM-4.97.0","HHVM-4.98.0","HPHP-2.1.0","gcc-4.6","nightly-2019.03.28","nightly-2019.03.29","nightly-2019.03.30","nightly-2019.03.31","nightly-2019.04.01","nightly-2019.04.02","nightly-2019.04.03","nightly-2019.04.04","nightly-2019.04.05","nightly-2019.04.06","nightly-2019.04.07","nightly-2019.04.08","nightly-2019.04.09","nightly-2019.04.10","nightly-2019.04.11","nightly-2019.04.12","nightly-2019.04.13","nightly-2019.04.14","nightly-2019.04.15","nightly-2019.04.16","nightly-2019.04.17","nightly-2019.04.18","nightly-2019.04.19","nightly-2019.04.20","nightly-2019.04.21","nightly-2019.04.22","nightly-2019.04.23","nightly-2019.04.24","nightly-2019.04.25","nightly-2019.04.26","nightly-2019.04.27","nightly-2019.04.28","nightly-2019.04.29","nightly-2019.04.30","nightly-2019.05.01","nightly-2019.05.02","nightly-2019.05.03","nightly-2019.05.04","nightly-2019.05.05","nightly-2019.05.06","nightly-2019.05.07","nightly-2019.05.08","nightly-2019.05.09","nightly-2019.05.10","nightly-2019.05.11","nightly-2019.05.12","nightly-2019.05.13","nightly-2019.05.14","nightly-2019.05.15","nightly-2019.05.16","nightly-2019.05.17","nightly-2019.05.18","nightly-2019.05.19","nightly-2019.05.20","nightly-2019.05.21","nightly-2019.05.22","nightly-2019.05.23","nightly-2019.05.24","nightly-2019.05.25","nightly-2019.05.26","nightly-2019.05.27","nightly-2019.05.28","nightly-2019.05.29","nightly-2019.05.30","nightly-2019.05.31","nightly-2019.06.01","nightly-2019.06.02","nightly-2019.06.03","nightly-2019.06.04","nightly-2019.06.05","nightly-2019.06.06","nightly-2019.06.07","nightly-2019.06.08","nightly-2019.06.09","nightly-2019.06.10","nightly-2019.06.11","nightly-2019.06.12","nightly-2019.06.13","nightly-2019.06.14","nightly-2019.06.15","nightly-2019.06.16","nightly-2019.06.17","nightly-2019.06.18","nightly-2019.06.19","nightly-2019.06.20","nightly-2019.06.21","nightly-2019.06.22","nightly-2019.06.23","nightly-2019.06.24","nightly-2019.06.25","nightly-2019.06.26","nightly-2019.06.27","nightly-2019.06.28","nightly-2019.06.29","nightly-2019.06.30","nightly-2019.07.01","nightly-2019.07.02","nightly-2019.07.03","nightly-2019.07.04","nightly-2019.07.05","nightly-2019.07.06","nightly-2019.07.07","nightly-2019.07.08","nightly-2019.07.09","nightly-2019.07.10","nightly-2019.07.11","nightly-2019.07.12","nightly-2019.07.13","nightly-2019.07.14","nightly-2019.07.15","nightly-2019.07.16","nightly-2019.07.17","nightly-2019.07.18","nightly-2019.07.19","nightly-2019.07.20","nightly-2019.07.21","nightly-2019.07.22","nightly-2019.07.23","nightly-2019.07.24","nightly-2019.07.25","nightly-2019.07.26","nightly-2019.07.27","nightly-2019.07.28","nightly-2019.07.29","nightly-2019.07.30","nightly-2019.07.31","nightly-2019.08.01","nightly-2019.08.02","nightly-2019.08.03","nightly-2019.08.04","nightly-2019.08.05","nightly-2019.08.06","nightly-2019.08.07","nightly-2019.08.08","nightly-2019.08.09","nightly-2019.08.10","nightly-2019.08.11","nightly-2019.08.12","nightly-2019.08.13","nightly-2019.08.14","nightly-2019.08.15","nightly-2019.08.16","nightly-2019.08.17","nightly-2019.08.18","nightly-2019.08.19","nightly-2019.08.20","nightly-2019.08.21","nightly-2019.08.22","nightly-2019.08.23","nightly-2019.08.24","nightly-2019.08.25","nightly-2019.08.26","nightly-2019.08.27","nightly-2019.08.28","nightly-2019.08.29","nightly-2019.08.30","ni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