Candidate: CVE-2020-1900
PublicDate: 2021-03-11 01:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1900
 https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3
 https://hhvm.com/blog/2020/06/30/security-update.html
Description:
 When unserializing an object with dynamic properties HHVM needs to
 pre-reserve the full size of the dynamic property array before inserting
 anything into it. Otherwise the array might resize, invalidating previously
 stored references. This pre-reservation was not occurring in HHVM prior to
 v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1,
 4.59.0, 4.60.0, 4.61.0, 4.62.0.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
Priority: low
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H [9.8 CRITICAL]


Patches_hhvm:
upstream_hhvm: needs-triage
precise/esm_hhvm: DNE
trusty_hhvm: ignored (out of standard support)
trusty/esm_hhvm: DNE
xenial_hhvm: ignored (end of standard support, was needs-triage)
bionic_hhvm: needs-triage
focal_hhvm: DNE
groovy_hhvm: DNE
hirsute_hhvm: DNE
impish_hhvm: DNE
jammy_hhvm: DNE
devel_hhvm: DNE