Detections
Analytics

Ubuntu 22.04 LTS : nginx vulnerabilities (USN-8210-1)

high Nessus Plugin ID 310737

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8210-1 advisory.

 It was discovered that the nginx ngx_mail_auth_http_module module incorrectly handled certain requests. An attacker could possibly use this issue to cause nginx to crash, resulting in a denial of service.
 (CVE-2026-27651)

 It was discovered that the nginx ngx_http_dav_module module incorrectly handled certain destination URIs.
 An attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly modify source or destination names outside of the document root. (CVE-2026-27654)

 It was discovered that the nginx ngx_http_mp4_module module incorrectly handled certain MP4 files. An attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-27784, CVE-2026-32647)

 It was discovered that the nginx ngx_mail_smtp_module module incorrectly handled certain CRLF sequences.
 An attacker could possibly use this issue to inject arbitrary SMTP headers. (CVE-2026-28753)

 It was discovered that the nginx ngx_stream_ssl_module module incorrectly handled revoked certificates.
 This could result in successful TLS handshakes even after an OCSP check identifies a certificate as revoked, contrary to expectations. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10.
 (CVE-2026-28755)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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.

See Also

https://ubuntu.com/security/notices/USN-8210-1

Plugin Details

Severity: High

ID: 310737

File Name: ubuntu_USN-8210-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/28/2026

Updated: 4/28/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C

CVSS Score Source: CVE-2026-27654

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.9

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2026-28755

CVSS v4

Risk Factor: High

Base Score: 8.5

Threat Score: 7.1

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-27784

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:nginx-core, p-cpe:/a:canonical:ubuntu_linux:nginx-extras, p-cpe:/a:canonical:ubuntu_linux:nginx-full, p-cpe:/a:canonical:ubuntu_linux:nginx-light, p-cpe:/a:canonical:ubuntu_linux:nginx-common, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-auth-pam, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-cache-purge, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-dav-ext, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-echo, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-fancyindex, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-geoip, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-headers-more-filter, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-image-filter, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-ndk, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-perl, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-subs-filter, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-uploadprogress, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-upstream-fair, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-xslt-filter, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-mail, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-nchan, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-rtmp, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream, p-cpe:/a:canonical:ubuntu_linux:nginx, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-geoip2, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream-geoip, p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream-geoip2, cpe:/o:canonical:ubuntu_linux:22.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/27/2026

Vulnerability Publication Date: 3/24/2026

Reference Information

CVE: CVE-2026-27651, CVE-2026-27654, CVE-2026-27784, CVE-2026-28753, CVE-2026-28755, CVE-2026-32647

IAVA: 2026-A-0280

USN: 8210-1