HHVM up to 4.3.0 scrypt_enc N/r/p memory corruption

Summaryinfo

A vulnerability was found in HHVM up to 4.3.0. It has been classified as critical. Affected by this vulnerability is the function scrypt_enc. This manipulation of the argument N/r/p as part of Parameter causes memory corruption. This vulnerability is registered as CVE-2019-3570. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in HHVM up to 4.3.0 and classified as critical. Affected by this vulnerability is the function scrypt_enc. The manipulation of the argument N/r/p as part of a Parameter leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 07/18/2019 (GitHub Repository). The advisory is shared at github.com. This vulnerability is known as CVE-2019-3570 since 01/02/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• HHVM

Version

• 4.0
• 4.1
• 4.2
• 4.3.0

License

• open-source

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CPE 2.2info

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