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Groups > linux.debian.bugs.dist > #1069415

Bug#993507: libgnutls30: fails to negotiate X25519 where NSS & OpenSSL succeed, success with X448

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Package: libgnutls30
Version: 3.7.2-2
Severity: normal

$ gnutls-cli --priority 'NORMAL:-GROUP-SECP256R1:-GROUP-SECP384R1:-GROUP-SECP521R1' fxtop.com
Processed 138 CA certificate(s).
Resolving 'fxtop.com:443'...
Connecting to '5.39.68.178:443'...
*** Fatal error: An illegal parameter has been received.

$ openssl s_client -curves X25519 -connect fxtop.com:443
CONNECTED(00000003)
(... snip ...)
---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
(... snip ...)


I attach a pcapng of network corresponding traffic. The same is
reproducible with www.collaboraoffice.com instead of fxtop.com

Note, though (not included in pcapng file):

$ gnutls-cli --priority 'NORMAL:-GROUP-SECP256R1:-GROUP-SECP384R1:-GROUP-SECP521R1:-GROUP-X25519' fxtop.com
(...)
Resolving 'fxtop.com:443'...
Connecting to '5.39.68.178:443'...
(...)
- Description: (TLS1.3)-(ECDHE-X448)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)


-- System Information:
Debian Release: 10.10
  APT prefers oldstable
  APT policy: (600, 'oldstable'), (500, 'oldstable-updates'), (400, 'testing'), (300, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.7.0-1-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libgnutls30 depends on:
ii  libc6          2.31-13
ii  libgmp10       2:6.1.2+dfsg-4
ii  libhogweed6    3.7.3-1
ii  libidn2-0      2.0.5-1+deb10u1
ii  libnettle8     3.7.3-1
ii  libp11-kit0    0.23.22-1
ii  libtasn1-6     4.16.0-2
ii  libunistring2  0.9.10-1

libgnutls30 recommends no packages.

Versions of packages libgnutls30 suggests:
ii  gnutls-bin  3.6.7-4+deb10u7

-- no debconf information

-- 
Lionel Mamane
Tél: +352 46 67 74
Fax: +352 46 67 76

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Bug#993507: libgnutls30: fails to negotiate X25519 where NSS & OpenSSL succeed, success with X448 Lionel Elie Mamane <lionel@mamane.lu> - 2021-09-02 12:30 +0200
  Bug#993507: libgnutls30: fails to negotiate X25519 where NSS & OpenSSL succeed, success with X448 Lionel Élie Mamane <lionel@mamane.lu> - 2021-09-02 20:50 +0200
    Bug#993507: libgnutls30: fails to negotiate X25519 where NSS & OpenSSL succeed, success with X448 Andreas Metzler <ametzler@bebt.de> - 2021-09-04 07:50 +0200

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