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CVE-2020-1919

HIGH
7.5
CVSS Score
Published: March 10, 2021 at 03:50 PM UTC
Updated: June 17, 2026 at 03:02 AM UTC
1 product affected across 1 vendorHHVM

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HHVM· Facebook
95%
v ≥ 4.57.0v ≥ 4.81.0v < 4.56.34.57.0 ≤ v < 4.80.24.81.0 ≤ v < 4.93.24.57.04.81.04.94.04.95.04.96.04.97.04.98.0
Vendor states this is fixed in 4.56.3 (unaffected)
Vendor states this is fixed in 4.80.2 (unaffected)
Vendor states this is fixed in 4.93.2 (unaffected)
Vendor states this is fixed in 4.94.1 (unaffected)
Vendor states this is fixed in 4.95.1 (unaffected)
Vendor states this is fixed in 4.96.1 (unaffected)
Vendor states this is fixed in 4.97.1 (unaffected)
Vendor states this is fixed in 4.98.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://hhvm.com/blog/2021/02/25/security-update.html

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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