Apache HTTP Server up to 2.4.38 HTTP/2 Request request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$5k-$25k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Apache HTTP Server 2.4.34/2.4.35/2.4.36/2.4.37/2.4.38. The affected element is an unknown function of the component HTTP2 Handler. The manipulation as part of Request leads to request smuggling. This vulnerability is listed as CVE-2019-0197. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Apache HTTP Server 2.4.34/2.4.35/2.4.36/2.4.37/2.4.38 (Web Server) and classified as problematic. This issue affects some unknown processing of the component HTTP2 Handler. The manipulation as part of a Request leads to a request smuggling vulnerability. Using CWE to declare the problem leads to CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. Impacted is availability. The summary by CVE is:

A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.

The bug was discovered 04/01/2019. The weakness was presented 06/11/2019 (Website). The advisory is shared at httpd.apache.org. The identification of this vulnerability is CVE-2019-0197 since 11/14/2018. The attack may be initiated remotely. Required for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/03/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 71 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277747 (Fedora security update for httpd (FEDORA-2019-cf7695b470)).

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 107666†). See VDB-103521, VDB-108939, VDB-115057 and VDB-115038 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.2
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: Request smuggling
CWE: CWE-444
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/14/2018 🔍
04/01/2019 +138 days 🔍
04/01/2019 +0 days 🔍
06/11/2019 +71 days 🔍
06/12/2019 +1 days 🔍
10/03/2023 +1574 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: RHSA-2019:3932
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-0197 (🔍)
GCVE (CVE): GCVE-0-2019-0197
GCVE (VulDB): GCVE-100-136373
SecurityFocus: 107666 - Apache HTTP Server CVE-2019-0211 Local Privilege Escalation Vulnerability
OSVDB: - Apache HTTP Server mod_http2 module denial of service

See also: 🔍

Entryinfo

Created: 06/12/2019 11:05
Updated: 10/03/2023 15:23
Changes: 06/12/2019 11:05 (65), 06/22/2020 16:52 (3), 10/03/2023 15:23 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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