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Package "libgcrypt20"

Name: libgcrypt20

Description:

LGPL Crypto library - runtime library
Latest version: 1.10.3-2ubuntu0.2
Release: noble (24.04)
Level: updates
Repository: main
Homepage: https://gnupg.org/software/libgcrypt/

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Repository Area Version
base universe 1.10.3-2build1
base main 1.10.3-2build1
security main 1.10.3-2ubuntu0.2
security universe 1.10.3-2ubuntu0.2
updates universe 1.10.3-2ubuntu0.2

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Changelog

Version: 1.10.3-2ubuntu0.2 2026-09-01 19:07:37 UTC

libgcrypt20 (1.10.3-2ubuntu0.2) noble-security; urgency=medium

  * SECURITY UPDATE: timing-based side-channel flaw in RSA implementation
    - debian/patches/CVE-2024-2236-1.patch: rsa: Do not accept invalid PKCS#1.5
      padding when deciphering in cipher/rsa-common.c, src/const-time.h.
    - debian/patches/CVE-2024-2236-2.patch: rsa: Constant time blinding removal
      in cipher/rsa.c, configure.ac, mpi/Makefile.am, mpi/mpi-internal.h,
      mpi/mpi-mul-cs.c, mpi/mpi-mul.c, src/gcrypt-int.h.
    - debian/patches/CVE-2024-2236-3.patch: Constant time conversion of the
      message to the SEXP in cipher/rsa.c, src/const-time.c, src/const-time.h,
      src/sexp.c.
    - debian/patches/CVE-2024-2236-4.patch: rsa: Implement constant-time
      conversion of MPI to string in cipher/rsa-common.c.
    - debian/patches/CVE-2024-2236-5.patch: cipher: Use the constant time
      conversion also for OAEP in cipher/rsa-common.c, cipher/rsa.c.
    - debian/patches/CVE-2024-2236-6.patch: Implement implicit rejection for
      PKCS#1.5 decipher in cipher/pubkey-internal.h, cipher/pubkey-util.c,
      cipher/rsa-common.c, cipher/rsa.c, src/cipher.h, src/const-time.c,
      src/const-time.h, tests/pkcs1v2-v15c.h, tests/pkcs1v2.c.
    - debian/rules: build with --enable-marvin-workaround.
    - Thanks for Red Hat for the patches!
    - CVE-2024-2236

 -- Marc Deslauriers Mon, 24 Aug 2026 14:06:29 -0400
Source diff to previous version
CVE-2024-2236 A timing-based side-channel flaw was found in libgcrypt's RSA implementation. This issue may allow a remote attacker to initiate a Bleichenbacher-sty

Version: 1.10.3-2ubuntu0.1 2026-05-27 16:07:34 UTC

  libgcrypt20 (1.10.3-2ubuntu0.1) noble-security; urgency=medium

  * SECURITY UPDATE: Heap-based buffer overflow via crafted ECDH ciphertext
    - debian/patches/CVE-2026-41989.patch: cipher:ecc: Fix decoding a point on
      Montgomery curve. in cipher/ecc-misc.c.
    - CVE-2026-41989

 -- Marc Deslauriers <email address hidden> Tue, 12 May 2026 14:17:24 +0200
CVE-2026-41989 Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.


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