nghttp2 up to 0.9.x/1.30.x ALTSVC Frame input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in nghttp2 up to 0.9.x/1.30.x. Affected by this issue is some unknown functionality of the component ALTSVC Frame Handler. This manipulation causes input validation. This vulnerability is registered as CVE-2018-1000168. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in nghttp2 up to 0.9.x/1.30.x. Affected by this vulnerability is an unknown code of the component ALTSVC Frame Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1.

The bug was discovered 04/13/2018. The weakness was published 05/08/2018 by Matt (Website). It is possible to read the advisory at nghttp2.org. This vulnerability is known as CVE-2018-1000168 since 04/09/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 25 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111095 (openSUSE Security Update : nodejs8 (openSUSE-2018-724)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237126 (Red Hat Update for Red Hat JBoss Core Services Apache HTTP Server 2.4.29 (RHSA-2019:0367)).

Upgrading to version 0.10.0 or 1.31.0 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111095) and SecurityFocus (BID 103518†). Similar entries are available at VDB-115113, VDB-116841, VDB-119538 and VDB-119541. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Nessus ID: 111095
Nessus Name: openSUSE Security Update : nodejs8 (openSUSE-2018-724)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860577
OpenVAS Name: nghttp2 < 1.31.1 DoS Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: nghttp2 0.10.0/1.31.0

Timelineinfo

03/27/2018 🔍
04/09/2018 +13 days 🔍
04/13/2018 +4 days 🔍
05/08/2018 +24 days 🔍
05/08/2018 +0 days 🔍
05/09/2018 +1 days 🔍
07/13/2018 +65 days 🔍
07/16/2018 +3 days 🔍
06/09/2025 +2520 days 🔍

Sourcesinfo

Advisory: RHSA-2019:0366
Researcher: Matt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-1000168 (🔍)
GCVE (CVE): GCVE-0-2018-1000168
GCVE (VulDB): GCVE-100-117415
SecurityFocus: 103518 - OpenSSL CVE-2018-0739 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 05/09/2018 09:03
Updated: 06/09/2025 19:58
Changes: 05/09/2018 09:03 (75), 02/02/2020 19:55 (6), 03/08/2023 19:47 (4), 06/09/2025 19:58 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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