Bug 1215657

Summary:	VUL-0: CVE-2023-42811: rage-encryption: aes-gcm: chosen ciphertext attack via `decrypt_in_place*` APIs
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Carlos López <carlos.lopez>
Component:	Security	Assignee:	William Brown <william.brown>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	cunix, security-team
Version:	Current
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/379692/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:	1215654
Bug Blocks:

Description Carlos López 2023-09-25 07:38:52 UTC

+++ This bug was initially created as a clone of Bug #1215654 +++

CVE-2023-42811

aes-gcm is a pure Rust implementation of the AES-GCM. Starting in version 0.10.0
and prior to version 0.10.3, in the AES GCM implementation of
decrypt_in_place_detached, the decrypted ciphertext (i.e. the correct plaintext)
is exposed even if tag verification fails. If a program using the `aes-gcm`
crate's `decrypt_in_place*` APIs accesses the buffer after decryption failure,
it will contain a decryption of an unauthenticated input. Depending on the
specific nature of the program this may enable Chosen Ciphertext Attacks (CCAs)
which can cause a catastrophic breakage of the cipher including full plaintext
recovery. Version 0.10.3 contains a fix for this issue.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-42811
https://www.cve.org/CVERecord?id=CVE-2023-42811
https://docs.rs/aes-gcm/latest/src/aes_gcm/lib.rs.html#309
https://github.com/RustCrypto/AEADs/security/advisories/GHSA-423w-p2w9-r7vq

Comment 1 OBSbugzilla Bot 2023-09-26 16:35:02 UTC

This is an autogenerated message for OBS integration:
This bug (1215657) was mentioned in
https://build.opensuse.org/request/show/1113697 Factory / rage-encryption

Comment 3 Maintenance Automation 2023-10-12 12:46:20 UTC

SUSE-SU-2023:4060-1: An update that solves one vulnerability can now be installed.

Category: security (moderate)
Bug References: 1215657
CVE References: CVE-2023-42811
Sources used:
openSUSE Leap 15.5 (src): rage-encryption-0.9.2+0-150500.3.3.1
Basesystem Module 15-SP5 (src): rage-encryption-0.9.2+0-150500.3.3.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.