HHVM up to 3.27.4/3.30 Stream out-of-bounds

Summaryinfo

A vulnerability was found in HHVM up to 3.27.4/3.30. It has been classified as critical. The impacted element is an unknown function of the component Stream Handler. The manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2019-3557. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in HHVM up to 3.27.4/3.30 and classified as critical. This issue affects an unknown code block of the component Stream Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 consistently. This behavior caused some stream functions, such as stream_get_line, to trigger an out-of-bounds read when operating on such malformed streams. The implementations were updated to return valid values consistently. This affects all supported versions of HHVM (3.30 and 3.27.4 and below).

The bug was discovered 01/14/2019. The weakness was published 01/15/2019 (Website). The advisory is shared at github.com. The identification of this vulnerability is CVE-2019-3557 since 01/02/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• HHVM

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.27.0
• 3.27.1
• 3.27.2
• 3.27.3
• 3.27.4
• 3.28
• 3.29
• 3.30

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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