CVE-2020-1900
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
64.7%
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.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| hhvm | * | cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | |
| hhvm | 4.57.0 | cpe:2.3:a:facebook:hhvm:4.57.0:*:*:*:*:*:*:* | |
| hhvm | 4.58.0 | cpe:2.3:a:facebook:hhvm:4.58.0:*:*:*:*:*:*:* | |
| hhvm | 4.58.1 | cpe:2.3:a:facebook:hhvm:4.58.1:*:*:*:*:*:*:* | |
| hhvm | 4.59.0 | cpe:2.3:a:facebook:hhvm:4.59.0:*:*:*:*:*:*:* | |
| hhvm | 4.60.0 | cpe:2.3:a:facebook:hhvm:4.60.0:*:*:*:*:*:*:* | |
| hhvm | 4.61.0 | cpe:2.3:a:facebook:hhvm:4.61.0:*:*:*:*:*:*:* | |
| hhvm | 4.62.0 | cpe:2.3:a:facebook:hhvm:4.62.0:*:*:*:*:*:*:* |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
64.7%