CVE-2020-1921

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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca	Patch Third Party Advisory
https://hhvm.com/blog/2021/02/25/security-update.html	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:facebook:hhvm::::::::
	cpe:2.3:a:facebook:hhvm::::::::
	cpe:2.3:a:facebook:hhvm::::::::
	cpe:2.3:a:facebook:hhvm:4.94.0:::::::*
	cpe:2.3:a:facebook:hhvm:4.95.0:::::::*
	cpe:2.3:a:facebook:hhvm:4.96.0:::::::*
	cpe:2.3:a:facebook:hhvm:4.97.0:::::::*
	cpe:2.3:a:facebook:hhvm:4.98.0:::::::*

History

No history.

Information

Published : 2021-03-10 16:15

Updated : 2021-03-15 15:29

NVD link : CVE-2020-1921

Mitre link : CVE-2020-1921

CVE.ORG link : CVE-2020-1921

JSON object : View

Products Affected

facebook

hhvm

CWE

CWE-787

Out-of-bounds Write

CWE-121

Stack-based Buffer Overflow

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