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SUSE: Nginx Important Auth Bypass & Leak CVE-2025-23419 CVE-2025-53859

suse
Calendar Grey October 1, 2025
Dist Suse Esm H88
Security update for SUSE: two important nginx vulnerabilities addressed with moderate severity ratings.
* bsc#1236851 * bsc#1248070 Cross-References: * CVE-2025-23419

Summary

## This update for nginx fixes the following issues: * CVE-2025-53859:Â the server side may leak arbitrary bytes during the NGINX SMTP authentication process (bsc#1248070). * CVE-2025-23419: session resumption can bypass client certificate authentication requirements using TLSv1.3 (bsc#1236851). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * openSUSE Leap 15.6 zypper in -t patch SUSE-2025-3444=1 openSUSE-SLE-15.6-2025-3444=1 * Server Applications Module 15-SP6 zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP6-2025-3444=1 * Server Applications Module 15-SP7

Topics%20covered

Topics Covered

security advisory SuSE important authentication nginx leak

References

* bsc#1236851

* bsc#1248070

Cross-

* CVE-2025-23419

* CVE-2025-53859

CVSS scores:

* CVE-2025-23419 ( SUSE ): 5.3

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2025-23419 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

* CVE-2025-23419 ( NVD ): 5.3

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2025-23419 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

* CVE-2025-53859 ( SUSE ): 6.3

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:03444-1
Release Date: 2025-10-01T12:43:06Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory SuSE important authentication nginx leak

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