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CVE-2019-3570

CRITICALCVSS 9.8/10EPSS 1.68%

Last modified

CVE-2019-3570 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Call to the scrypt_enc() function in HHVM can lead to heap corruption by using specifically crafted parameters (N, r and p). This happens if the parameters are configurable by an attacker for instance by providing the output of scrypt_enc() in a context where Hack/PHP code would attempt to verify it by re-running scrypt_enc() with the same parameters. EPSS estimates a 1.68% chance of exploitation in the next 30 days.

Description

Call to the scrypt_enc() function in HHVM can lead to heap corruption by using specifically crafted parameters (N, r and p). This happens if the parameters are configurable by an attacker for instance by providing the output of scrypt_enc() in a context where Hack/PHP code would attempt to verify it by re-running scrypt_enc() with the same parameters. This could result in information disclosure, memory being overwriten or crashes of the HHVM process. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.68%

74.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FacebookHiphop Virtual Machine<= 3.30.5
FacebookHiphop Virtual Machine>= 4.0.0, <= 4.0.4
FacebookHiphop Virtual Machine4.1.0
FacebookHiphop Virtual Machine4.2.0
FacebookHiphop Virtual Machine4.3.0
FacebookHiphop Virtual Machine4.4.0
FacebookHiphop Virtual Machine4.5.0
FacebookHiphop Virtual Machine4.6.0
FacebookHiphop Virtual Machine4.7.0
FacebookHiphop Virtual Machine4.8.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-3570?
Call to the scrypt_enc() function in HHVM can lead to heap corruption by using specifically crafted parameters (N, r and p). This happens if the parameters are configurable by an attacker for instance by providing the output of scrypt_enc() in a context where Hack/PHP code would attempt to verify it by re-running scrypt_enc() with the same parameters. This could result in information disclosure, memory being overwriten or crashes of the HHVM process. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.
How severe is CVE-2019-3570?
CVE-2019-3570 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.
How do I fix CVE-2019-3570?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3570?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST