Detections
Analytics
CentOS Linux 6 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / nginx-mod-http-geoip / etc Multiple Vulnerabilities (CENTOS6:CLSA-2026:1790586276)
high Nessus Plugin ID 362901
Language:
Synopsis
The CentOS Linux host is missing one or more security updates.Description
The CentOS Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS6:CLSA-2026:1790586276 advisory.- When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-27651)
- NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_dav_module module that might allow an attacker to trigger a buffer overflow to the NGINX worker process; this vulnerability may result in termination of the NGINX worker process or modification of source or destination file names outside the document root. This issue affects NGINX Open Source and NGINX Plus when the configuration file uses DAV module MOVE or COPY methods, prefix location (nonregular expression location configuration), and alias directives. The integrity impact is constrained because the NGINX worker process user has low privileges and does not have access to the entire system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-27654)
- The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-27784)
- NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to trigger a buffer over-read or over-write to the NGINX worker memory resulting in its termination or possibly code execution, using a specially crafted MP4 file. This issue affects NGINX Open Source and NGINX Plus if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-32647)
- A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-42946)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages based on the guidance in TuxCare advisory CENTOS6:CLSA-2026:1790586276.See Also
Plugin Details
Severity: High
ID: 362901
File Name: tuxcare_centos_6_CLSA-2026-1790586276.nasl
Version: 1.2
Type: Local
Agent: unix
Family: CentOS Local Security Checks
Published: 10/4/2026
Updated: 10/7/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.54
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.1
Temporal Score: 5.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:C
CVSS Score Source: CVE-2026-42946
CVSS v3
Risk Factor: High
Base Score: 7.4
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.8
Threat Score: 7.8
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-27654
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/28/2026
Vulnerability Publication Date: 3/24/2026
Reference Information
CVE: CVE-2026-27651, CVE-2026-27654, CVE-2026-27784, CVE-2026-32647, CVE-2026-42946
CLSA: 2026:1790586276