H2O up to 1.7.2/2.0.0-beta4 HTTP/2 Connection lib/http2/connection.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in H2O up to 1.7.2/2.0.0-beta4. It has been classified as critical. The impacted element is an unknown function in the library lib/http2/connection.c of the component HTTP2 Connection Handler. This manipulation causes use after free. This vulnerability is handled as CVE-2016-4817. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in H2O up to 1.7.2/2.0.0-beta4 and classified as critical. Affected by this vulnerability is an unknown code block in the library lib/http2/connection.c of the component HTTP2 Connection Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.

The weakness was released 06/19/2016 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2016-4817 since 05/17/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.7.3 or 2.0.0-beta5 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Upgrade: H2O 1.7.3/2.0.0-beta5
Patch: github.com

Timelineinfo

05/17/2016 🔍
06/18/2016 +32 days 🔍
06/19/2016 +1 days 🔍
06/19/2016 +0 days 🔍
08/24/2022 +2257 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1c0808d580da09fdec5a9a74ff09e103ea058dd4
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4817 (🔍)
GCVE (CVE): GCVE-0-2016-4817
GCVE (VulDB): GCVE-100-88051

Entryinfo

Created: 06/19/2016 18:57
Updated: 08/24/2022 12:46
Changes: 06/19/2016 18:57 (55), 01/30/2019 08:24 (3), 08/24/2022 12:38 (5), 08/24/2022 12:46 (1)
Complete: 🔍
Cache ID: 216::103

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