Vulnerability-Lookup

OPENSUSE-SU-2026:21225-1

Vulnerability from csaf_opensuse - Published: 2026-07-03 11:05 - Updated: 2026-09-17 17:37

Summary

Security update for rmt-server

Severity

Important

Notes

Title of the patch: Security update for rmt-server

Description of the patch: This update for rmt-server fixes the following issue Update to 3.0.0: - CVE-2026-42256: net-imap: hostile server can perform a DoS on client authenticating a connection with SCRAM-SHA1 or SCRAM-SHA2 (bsc#1265369). Changes for rmt-server: - Version 3.0.0 * Security fix: Remove unused ActionMailer/ActionMailbox components to eliminate CVE-2026-42256 (bsc#1265369) * Split Rails meta-gem into individual components for better security control - Version 2.26 * Add support for processing, storing, and syncing system profiles (jsc#TEL-265) - Version 2.25 * fix rmt-cli list and purge commands for large data (bsc#1253146 and bsc#1253147) * Fix mirroring of SLE16 NVIDIA-GPU-Compute-Toolkit-CUDA repo (bsc#1256826) * Support for new redirect_repo_hosts config, to exclude some repo hosts from mirroring, and send clients directly there (jsc#SCC-452) * rmt-server-pubcloud * Clearer error message (bsc#1256883) * Handle zypper response when data exporter raises an error (bsc#1257133) * Add Valkey + Sidekiq for async processing * Enable mirroring xz compressed repositories (bsc#1246976) * Rack 2.2.20 security update (bsc#1253953, bsc#1251937) * Drop some de-published products from RMT * Include Live-Patching for SLES 15.X (jsc#PCT-630) * Handle only one data exporter (bsc#1248869) * Do not decode instance data from db to access registry (bsc#1248510) * Handle instance verification exceptions

Patchnames: openSUSE-Leap-16.0-1154

CVE-2026-42256

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 13 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:ansible-rmt-server-0:3.0.0-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-0:3.0.0-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-0:3.0.0-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-0:3.0.0-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-0:3.0.0-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-config-0:3.0.0-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-config-0:3.0.0-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-config-0:3.0.0-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-config-0:3.0.0-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-pubcloud-0:3.0.0-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-pubcloud-0:3.0.0-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-pubcloud-0:3.0.0-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:rmt-server-pubcloud-0:3.0.0-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact important

References

16 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1246976	self
https://bugzilla.suse.com/1248510	self
https://bugzilla.suse.com/1248869	self
https://bugzilla.suse.com/1251937	self
https://bugzilla.suse.com/1253146	self
https://bugzilla.suse.com/1253147	self
https://bugzilla.suse.com/1253953	self
https://bugzilla.suse.com/1256826	self
https://bugzilla.suse.com/1256883	self
https://bugzilla.suse.com/1257133	self
https://bugzilla.suse.com/1265369	self
https://www.suse.com/security/cve/CVE-2026-42256/	self
https://www.suse.com/security/cve/CVE-2026-42256	external
https://bugzilla.suse.com/1265366	external

JSON

To clipboard

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CVE-2026-42256 (GCVE-0-2026-42256)

Vulnerability from cvelistv5 – Published: 2026-05-09 19:38 – Updated: 2026-05-11 17:04

Title

net-imap: Denial of service via high iteration count for `SCRAM-*` authentication

Summary

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Severity

6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-11 17:04 UTC

CWE

CWE-1322 - Use of Blocking Code in Single-threaded, Non-blocking Context
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/ruby/net-imap/security/advisor…	x_refsource_CONFIRM
https://github.com/ruby/net-imap/commit/158d0b505…	x_refsource_MISC
https://github.com/ruby/net-imap/commit/808001bc4…	x_refsource_MISC
https://github.com/ruby/net-imap/commit/99f59eab6…	x_refsource_MISC
https://github.com/ruby/net-imap/releases/tag/v0.4.24	x_refsource_MISC
https://github.com/ruby/net-imap/releases/tag/v0.5.14	x_refsource_MISC
https://github.com/ruby/net-imap/releases/tag/v0.6.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ruby	net-imap	Affected: >= 0.4.0, < 0.4.24 Affected: >= 0.5.0, < 0.5.14 Affected: >= 0.6.0, < 0.6.4

Show details on NVD website

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To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2026:21225-1

CVE-2026-42256 (GCVE-0-2026-42256)

Tags

Sightings

Nomenclature

Related by attack behaviour