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CVE-2020-1899
Good to know:
Date: March 10, 2021
The unserialize() function supported a type code, "S", which was meant to be supported only for APC serialization. This type code allowed arbitrary memory addresses to be accessed as if they were static StringData objects. This issue affected 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.
Language: C++
Severity Score
Related Resources (5)
Severity Score
Weakness Type (CWE)
Buffer Errors
CWE-119Top Fix
Upgrade Version
Upgrade to version HHVM-4.32.3,HHVM-4.56.1,HHVM-4.58.2,HHVM-4.59.1,HHVM-4.60.1,HHVM-4.61.1,HHVM-4.62.1,HHVM-4.64.0
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | NONE |
| Availability (A): | NONE |
CVSS v2
| Base Score: |
|
|---|---|
| Access Vector (AV): | NETWORK |
| Access Complexity (AC): | LOW |
| Authentication (AU): | NONE |
| Confidentiality (C): | PARTIAL |
| Integrity (I): | NONE |
| Availability (A): | NONE |
| Additional information: |