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Permalink CVE-2026-24850

5.3 MEDIUM

CVSS version: 3.1
Attack vector (AV): NETWORK
Attack complexity (AC): LOW
Privileges required (PR): NONE
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): NONE
Integrity impact (I): LOW
Availability impact (A): NONE

created 1 month, 3 weeks ago

ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices

The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-dsa` crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be **strictly increasing**. The current implementation uses a non-strict monotonic check (`<=` instead of `<`), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict `<` comparison to `<=`, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.

References

https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9 x_refsource_CONFIRM
https://github.com/RustCrypto/signatures/issues/894 x_refsource_MISC
https://github.com/RustCrypto/signatures/pull/895 x_refsource_MISC
https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a x_refsource_MISC
https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38 x_refsource_MISC
https://csrc.nist.gov/pubs/fips/204/final x_refsource_MISC
https://datatracker.ietf.org/doc/html/rfc9881 x_refsource_MISC
https://github.com/C2SP/wycheproof x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json x_refsource_MISC
https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9 x_refsource_CONFIRM
https://github.com/RustCrypto/signatures/issues/894 x_refsource_MISC
https://github.com/RustCrypto/signatures/pull/895 x_refsource_MISC
https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a x_refsource_MISC
https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38 x_refsource_MISC
https://csrc.nist.gov/pubs/fips/204/final x_refsource_MISC
https://datatracker.ietf.org/doc/html/rfc9881 x_refsource_MISC
https://github.com/C2SP/wycheproof x_refsource_MISC
https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json x_refsource_MISC

Affected products

signatures

==>= 0.0.4, < 0.1.0-rc.4

Matching in nixpkgs

pkgs.python312Packages.ts1-signatures

TLS and HTTP signature and fingerprint library

nixos-unstable ts1-signatures-0-unstable-2024-08-10
- nixpkgs-unstable ts1-signatures-0-unstable-2024-08-10
- nixos-unstable-small ts1-signatures-0-unstable-2024-08-10

pkgs.python313Packages.ts1-signatures

TLS and HTTP signature and fingerprint library

nixos-unstable ts1-signatures-0-unstable-2024-08-10
- nixpkgs-unstable ts1-signatures-0-unstable-2024-08-10
- nixos-unstable-small ts1-signatures-0-unstable-2024-08-10

pkgs.perlPackages.MethodSignaturesSimple

Basic method declarations with signatures, without source filters

nixos-unstable 1.07
- nixpkgs-unstable 1.07
- nixos-unstable-small 1.07

pkgs.haskellPackages.PartialTypeSignatures

emulate partial type signatures with template haskell

nixos-unstable 0.1.0.1
- nixpkgs-unstable 0.1.0.1
- nixos-unstable-small 0.1.0.1

pkgs.perl538Packages.MethodSignaturesSimple

Basic method declarations with signatures, without source filters

nixos-unstable 1.07
- nixpkgs-unstable 1.07
- nixos-unstable-small 1.07

pkgs.perl540Packages.MethodSignaturesSimple

Basic method declarations with signatures, without source filters

nixos-unstable 1.07
- nixpkgs-unstable 1.07
- nixos-unstable-small 1.07

pkgs.python312Packages.http-message-signatures

Requests authentication module for HTTP Signature

nixos-unstable 1.0.0
- nixpkgs-unstable 1.0.0
- nixos-unstable-small 1.0.0

pkgs.python313Packages.http-message-signatures

Requests authentication module for HTTP Signature

nixos-unstable 1.0.0
- nixpkgs-unstable 1.0.0
- nixos-unstable-small 1.0.0

pkgs.haskellPackages.hasktorch-signatures-types

Core types for Hasktorch backpack signatures

nixos-unstable 0.0.1.0
- nixpkgs-unstable 0.0.1.0
- nixos-unstable-small 0.0.1.0

pkgs.python312Packages.requests-http-message-signatures

Request authentication plugin implementing IETF HTTP Message Signatures

nixos-unstable -
- nixos-unstable-small 0.3.0

pkgs.python313Packages.requests-http-message-signatures

Request authentication plugin implementing IETF HTTP Message Signatures

nixos-unstable -
- nixos-unstable-small 0.3.0

Package maintainers

@fabaff Fabian Affolter <mail@fabian-affolter.ch>
@GGG-KILLER GGG <gggkiller2@gmail.com>
@fricklerhandwerk Valentin Gagarin <valentin@fricklerhandwerk.de>
@eljamm Fedi Jamoussi <fedi.jamoussi@protonmail.ch>
@wegank Weijia Wang <contact@weijia.wang>
@OPNA2608 Cosima Neidahl <opna2608@protonmail.com>
@Prince213 Sizhe Zhao <prc.zhao@outlook.com>
@ethancedwards8 Ethan Carter Edwards <ethan@ethancedwards.com>

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