Apache HTTP Server up to 2.2.32/2.4.25 mod_ssl ap_hook_process_connection null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Apache HTTP Server up to 2.2.32/2.4.25. Impacted is the function ap_hook_process_connection of the component mod_ssl. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2017-3169. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Apache HTTP Server up to 2.2.32/2.4.25 (Web Server). Affected is the function ap_hook_process_connection of the component mod_ssl. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.

The bug was discovered 06/19/2017. The weakness was published 06/20/2017 (Website). The advisory is available at lists.apache.org. This vulnerability is traded as CVE-2017-3169 since 12/05/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 100995 (Apache 2.2.x < 2.2.33-dev / 2.4.x < 2.4.26 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170131 (SUSE Enterprise Linux Security Update for apache2 (SUSE-SU-2017:1714-1)).

Upgrading to version 2.4.26 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100995) and SecurityFocus (BID 99134†). Similar entries are available at VDB-21337, VDB-63776, VDB-90671 and VDB-96545. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 100995
Nessus Name: Apache 2.2.x < 2.2.33-dev / 2.4.x < 2.4.26 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703896
OpenVAS Name: Debian Security Advisory DSA 3896-1 (apache2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: HTTP Server 2.4.26

Timelineinfo

12/05/2016 🔍
06/19/2017 +196 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/20/2017 +1 days 🔍
06/20/2017 +0 days 🔍
06/22/2017 +2 days 🔍
12/08/2022 +1995 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: RHSA-2017:2478
Researcher: Vasileios Panopoulos, AdNovum Informatik AG
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-3169 (🔍)
GCVE (CVE): GCVE-0-2017-3169
GCVE (VulDB): GCVE-100-102690

OVAL: 🔍

SecurityFocus: 99134 - Apache HTTP Server CVE-2017-3169 Denial of Service Vulnerability
SecurityTracker: 1038711

See also: 🔍

Entryinfo

Created: 06/20/2017 11:49
Updated: 12/08/2022 16:37
Changes: 06/20/2017 11:49 (76), 10/19/2019 10:32 (5), 12/29/2020 10:33 (2), 12/29/2020 10:36 (1), 12/08/2022 16:37 (3)
Complete: 🔍
Cache ID: 216::103

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