Debian Libgcrypt20 vulnerabilities

CVE-2024-2236 [MEDIUM] CVE-2024-2236: libgcrypt20 - A timing-based side-channel flaw was found in libgcrypt's RSA implementation. Th... A timing-based side-channel flaw was found in libgcrypt's RSA implementation. This issue may allow a remote attacker to initiate a Bleichenbacher-style attack, which can lead to the decryption of RSA ciphertexts. Scope: local bookworm: open bullseye: open forky: open sid: open trixie: open

CVE-2021-33560 [HIGH] CVE-2021-33560: libgcrypt20 - Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption beca... Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP. Scope: local bookworm: resolved (fixed in 1.9.4-2) bullseye: open forky: resolved (fixed in 1.9.4-2

CVE-2021-40528 [MEDIUM] CVE-2021-40528: libgcrypt20 - The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery b... The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack again

CVE-2021-3345 [HIGH] CVE-2021-3345: libgcrypt20 - _gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a he... _gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later. Scope: local bookworm: resolved bullseye: resolved forky: resolved sid: resolved trixie: resolved

CVE-2019-13627 [MEDIUM] CVE-2019-13627: libgcrypt20 - It was discovered that there was a ECDSA timing attack in the libgcrypt20 crypto... It was discovered that there was a ECDSA timing attack in the libgcrypt20 cryptographic library. Version affected: 1.8.4-5, 1.7.6-2+deb9u3, and 1.6.3-2+deb8u4. Versions fixed: 1.8.5-2 and 1.6.3-2+deb8u7. Scope: local bookworm: resolved (fixed in 1.8.5-1) bullseye: resolved (fixed in 1.8.5-1) forky: resolved (fixed in 1.8.5-1) sid: resolved (fixed in 1.8.5-1) t

CVE-2018-0495 [MEDIUM] CVE-2018-0495: libgcrypt20 - Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channe... Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either th

CVE-2018-6829 [HIGH] CVE-2018-6829: gnupg1 - cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages direc... cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for Libgcrypt's ElGamal implemen

CVE-2017-0379 [HIGH] CVE-2017-0379: libgcrypt20 - Libgcrypt before 1.8.1 does not properly consider Curve25519 side-channel attack... Libgcrypt before 1.8.1 does not properly consider Curve25519 side-channel attacks, which makes it easier for attackers to discover a secret key, related to cipher/ecc.c and mpi/ec.c. Scope: local bookworm: resolved (fixed in 1.7.9-1) bullseye: resolved (fixed in 1.7.9-1) forky: resolved (fixed in 1.7.9-1) sid: resolved (fixed in 1.7.9-1) trixie: resolved (fixed in

CVE-2017-7526 [MEDIUM] CVE-2017-7526: gnupg1 - libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resu... libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware wh

CVE-2017-9526 [MEDIUM] CVE-2017-9526: libgcrypt20 - In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from si... In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library. Scope: local bookworm: resolv

CVE-2016-6313 [MEDIUM] CVE-2016-6313: gnupg1 - The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1... The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits. Scope: local bookworm: resolved (fixed in 1.4.21-1) bullseye: resolved (fixed in 1.4.21-1) forky: resolved (fi

CVE-2015-0837 [MEDIUM] CVE-2015-0837: libgcrypt20 - The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows a... The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack." Scope: local bookworm: resolved (fixed in 1.6.3-2) bullseye: resolved (fixed in 1.6.3-2) f

CVE-2015-7511 [LOW] CVE-2015-7511: libgcrypt20 - Libgcrypt before 1.6.5 does not properly perform elliptic-point curve multiplica... Libgcrypt before 1.6.5 does not properly perform elliptic-point curve multiplication during decryption, which makes it easier for physically proximate attackers to extract ECDH keys by measuring electromagnetic emanations. Scope: local bookworm: resolved (fixed in 1.6.5-2) bullseye: resolved (fixed in 1.6.5-2) forky: resolved (fixed in 1.6.5-2) sid: resolved (fixed

CVE-2014-3591 [MEDIUM] CVE-2014-3591: libgcrypt20 - Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext bli... Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication. Scope: local bookworm: resolved (fixed in 1.6.3-2) bul

CVE-2014-5270 [LOW] CVE-2014-5270: libgcrypt20 - Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly p... Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576. Scope: local bookworm: re