Search criteria
45 vulnerabilities found for libgcrypt by GnuPG
FKIE_CVE-2021-40528
Vulnerability from fkie_nvd - Published: 2021-09-06 19:15 - Updated: 2025-06-09 16:15
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
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 against OpenPGP.
References
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FKIE_CVE-2021-33560
Vulnerability from fkie_nvd - Published: 2021-06-08 11:15 - Updated: 2025-12-03 15:15
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
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.
References
Impacted products
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FKIE_CVE-2021-3345
Vulnerability from fkie_nvd - Published: 2021-01-29 15:15 - Updated: 2024-11-21 06:21
Severity ?
Summary
_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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | libgcrypt | 1.9.0 | |
| oracle | communications_billing_and_revenue_management | 12.0.0.3.0 |
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FKIE_CVE-2015-0837
Vulnerability from fkie_nvd - Published: 2019-11-29 22:15 - Updated: 2024-11-21 02:23
Severity ?
Summary
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."
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | gnupg | * | |
| gnupg | libgcrypt | * | |
| debian | debian_linux | 7.0 | |
| debian | debian_linux | 8.0 |
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FKIE_CVE-2014-3591
Vulnerability from fkie_nvd - Published: 2019-11-29 22:15 - Updated: 2024-11-21 02:08
Severity ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | gnupg | * | |
| gnupg | libgcrypt | * | |
| debian | debian_linux | 7.0 | |
| debian | debian_linux | 8.0 |
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FKIE_CVE-2019-12904
Vulnerability from fkie_nvd - Published: 2019-06-20 00:15 - Updated: 2024-11-21 04:23
Severity ?
Summary
In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) NOTE: the vendor's position is that the issue report cannot be validated because there is no description of an attack
References
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},
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FKIE_CVE-2017-7526
Vulnerability from fkie_nvd - Published: 2018-07-26 13:29 - Updated: 2024-11-21 03:32
Severity ?
6.1 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
6.8 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
6.8 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Summary
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 where the private RSA key is used.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | libgcrypt | * | |
| canonical | ubuntu_linux | 12.04 | |
| canonical | ubuntu_linux | 14.04 | |
| canonical | ubuntu_linux | 16.04 | |
| debian | debian_linux | 8.0 | |
| debian | debian_linux | 9.0 |
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FKIE_CVE-2018-0495
Vulnerability from fkie_nvd - Published: 2018-06-13 23:29 - Updated: 2024-11-21 03:38
Severity ?
Summary
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 the local machine or a different virtual machine on the same physical host.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | libgcrypt | * | |
| gnupg | libgcrypt | * | |
| canonical | ubuntu_linux | 12.04 | |
| canonical | ubuntu_linux | 14.04 | |
| canonical | ubuntu_linux | 16.04 | |
| canonical | ubuntu_linux | 17.10 | |
| canonical | ubuntu_linux | 18.04 | |
| canonical | ubuntu_linux | 18.10 | |
| debian | debian_linux | 8.0 | |
| debian | debian_linux | 9.0 | |
| redhat | ansible_tower | 3.3 | |
| redhat | enterprise_linux_desktop | 7.0 | |
| redhat | enterprise_linux_server | 7.0 | |
| redhat | enterprise_linux_workstation | 7.0 | |
| oracle | traffic_director | 11.1.1.9.0 |
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},
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FKIE_CVE-2018-6829
Vulnerability from fkie_nvd - Published: 2018-02-07 23:29 - Updated: 2024-11-21 04:11
Severity ?
Summary
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 implementation.
References
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://github.com/weikengchen/attack-on-libgcrypt-elgamal | Third Party Advisory | |
| cve@mitre.org | https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki | Exploit, Third Party Advisory | |
| cve@mitre.org | https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html | Issue Tracking, Third Party Advisory | |
| cve@mitre.org | https://www.oracle.com/security-alerts/cpujan2020.html | ||
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/weikengchen/attack-on-libgcrypt-elgamal | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki | Exploit, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html | Issue Tracking, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.oracle.com/security-alerts/cpujan2020.html |
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}
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},
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FKIE_CVE-2017-0379
Vulnerability from fkie_nvd - Published: 2017-08-29 22:29 - Updated: 2025-04-20 01:37
Severity ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| gnupg | libgcrypt | * | |
| debian | debian_linux | 9.0 |
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{
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"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
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{
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CVE-2021-40528 (GCVE-0-2021-40528)
Vulnerability from cvelistv5 – Published: 2021-09-06 00:00 – Updated: 2025-06-09 15:13
VLAI?
Summary
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 against OpenPGP.
Severity ?
5.9 (Medium)
CWE
- n/a
Assigner
References
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CVE-2021-33560 (GCVE-0-2021-33560)
Vulnerability from cvelistv5 – Published: 2021-06-08 00:00 – Updated: 2025-12-03 14:39
VLAI?
Summary
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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CVE-2021-3345 (GCVE-0-2021-3345)
Vulnerability from cvelistv5 – Published: 2021-01-29 14:20 – Updated: 2024-08-03 16:53
VLAI?
Summary
_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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2015-0837 (GCVE-0-2015-0837)
Vulnerability from cvelistv5 – Published: 2019-11-29 21:10 – Updated: 2024-08-06 04:26
VLAI?
Summary
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."
Severity ?
No CVSS data available.
CWE
- Other
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Impacted products
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CVE-2014-3591 (GCVE-0-2014-3591)
Vulnerability from cvelistv5 – Published: 2019-11-29 21:02 – Updated: 2024-08-06 10:50
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- Other
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2019-12904 (GCVE-0-2019-12904)
Vulnerability from cvelistv5 – Published: 2019-06-19 23:34 – Updated: 2024-08-04 23:32
VLAI?
Summary
In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) NOTE: the vendor's position is that the issue report cannot be validated because there is no description of an attack
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2017-7526 (GCVE-0-2017-7526)
Vulnerability from cvelistv5 – Published: 2018-07-26 13:00 – Updated: 2024-08-05 16:04
VLAI?
Summary
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 where the private RSA key is used.
Severity ?
6.1 (Medium)
CWE
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
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CVE-2018-0495 (GCVE-0-2018-0495)
Vulnerability from cvelistv5 – Published: 2018-06-13 23:00 – Updated: 2024-08-05 03:28
VLAI?
Summary
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 the local machine or a different virtual machine on the same physical host.
Severity ?
No CVSS data available.
CWE
- side-channel attack
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 |
Affected:
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3
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CVE-2018-6829 (GCVE-0-2018-6829)
Vulnerability from cvelistv5 – Published: 2018-02-07 23:00 – Updated: 2024-08-05 06:17
VLAI?
Summary
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 implementation.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2017-0379 (GCVE-0-2017-0379)
Vulnerability from cvelistv5 – Published: 2017-08-29 22:00 – Updated: 2024-08-05 13:03
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- local side-channel attack
Assigner
References
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CVE-2021-40528 (GCVE-0-2021-40528)
Vulnerability from nvd – Published: 2021-09-06 00:00 – Updated: 2025-06-09 15:13
VLAI?
Summary
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 against OpenPGP.
Severity ?
5.9 (Medium)
CWE
- n/a
Assigner
References
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CVE-2021-33560 (GCVE-0-2021-33560)
Vulnerability from nvd – Published: 2021-06-08 00:00 – Updated: 2025-12-03 14:39
VLAI?
Summary
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.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-3345 (GCVE-0-2021-3345)
Vulnerability from nvd – Published: 2021-01-29 14:20 – Updated: 2024-08-03 16:53
VLAI?
Summary
_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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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CVE-2015-0837 (GCVE-0-2015-0837)
Vulnerability from nvd – Published: 2019-11-29 21:10 – Updated: 2024-08-06 04:26
VLAI?
Summary
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."
Severity ?
No CVSS data available.
CWE
- Other
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
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CVE-2014-3591 (GCVE-0-2014-3591)
Vulnerability from nvd – Published: 2019-11-29 21:02 – Updated: 2024-08-06 10:50
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- Other
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
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CVE-2019-12904 (GCVE-0-2019-12904)
Vulnerability from nvd – Published: 2019-06-19 23:34 – Updated: 2024-08-04 23:32
VLAI?
Summary
In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) NOTE: the vendor's position is that the issue report cannot be validated because there is no description of an attack
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
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CVE-2017-7526 (GCVE-0-2017-7526)
Vulnerability from nvd – Published: 2018-07-26 13:00 – Updated: 2024-08-05 16:04
VLAI?
Summary
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 where the private RSA key is used.
Severity ?
6.1 (Medium)
CWE
Assigner
References
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CVE-2018-0495 (GCVE-0-2018-0495)
Vulnerability from nvd – Published: 2018-06-13 23:00 – Updated: 2024-08-05 03:28
VLAI?
Summary
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 the local machine or a different virtual machine on the same physical host.
Severity ?
No CVSS data available.
CWE
- side-channel attack
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 |
Affected:
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3
|
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CVE-2018-6829 (GCVE-0-2018-6829)
Vulnerability from nvd – Published: 2018-02-07 23:00 – Updated: 2024-08-05 06:17
VLAI?
Summary
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 implementation.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2017-0379 (GCVE-0-2017-0379)
Vulnerability from nvd – Published: 2017-08-29 22:00 – Updated: 2024-08-05 13:03
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
- local side-channel attack
Assigner
References
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