CWE-385
Covert Timing Channel
Description
Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.
Hierarchy (View 1000)
Parents
Children
none
Related attack patterns (CAPEC)
CAPEC-462
CVEs mapped to this weakness (45)
page 2 of 3| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2020-25657 | Med | 0.38 | 5.9 | 0.02 | Jan 12, 2021 | A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality. | ||
| CVE-2017-2624 | Med | 0.38 | 5.9 | 0.01 | Jul 27, 2018 | It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is… | ||
| CVE-2025-59432 | Med | 0.36 | — | 0.01 | Sep 22, 2025 | SCRAM (Salted Challenge Response Authentication Mechanism) is part of the family of Simple Authentication and Security Layer (SASL, RFC 4422) authentication mechanisms. Prior to version 3.2, a timing attack vulnerability exists in the SCRAM Java implementation. The issue arises… | ||
| CVE-2019-19338 | Med | 0.36 | 5.5 | 0.00 | Jul 13, 2020 | A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA… | ||
| CVE-2016-7056 | Med | 0.36 | 5.5 | 0.01 | Sep 10, 2018 | A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys. | ||
| CVE-2018-10846 | Med | 0.36 | 5.6 | 0.00 | Aug 22, 2018 | A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets. | ||
| CVE-2026-6478 | Med | 0.35 | 6.5 | 0.01 | May 14, 2026 | Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases… | ||
| CVE-2025-9231 | Med | 0.35 | 6.5 | 0.02 | Sep 30, 2025 | Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow… | ||
| CVE-2024-25964 | Med | 0.35 | 5.3 | 0.01 | Mar 25, 2024 | Dell PowerScale OneFS 9.5.0.x through 9.7.0.x contain a covert timing channel vulnerability. A remote unauthenticated attacker could potentially exploit this vulnerability, leading to denial of service. | ||
| CVE-2025-27587 | Med | 0.34 | 5.3 | 0.00 | Jun 16, 2025 | OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to a Minerva attack, exploitable by measuring the time of signing of random messages using the EVP_DigestSign API, and then using the private key to extract the K value (nonce) from the signatures. Next, based… | ||
| CVE-2025-66442 | Med | 0.33 | 5.1 | 0.00 | Apr 1, 2026 | In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected. | ||
| CVE-2020-35166 | Med | 0.33 | 5.1 | 0.01 | Jul 11, 2022 | Dell BSAFE Crypto-C Micro Edition, versions before 4.1.5, and Dell BSAFE Micro Edition Suite, versions before 4.6, contain an Observable Timing Discrepancy Vulnerability. | ||
| CVE-2020-25659 | Med | 0.32 | 5.9 | 0.02 | Jan 11, 2021 | python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext. | ||
| CVE-2018-10845 | Med | 0.32 | 5.9 | 0.04 | Aug 22, 2018 | It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets. | ||
| CVE-2018-10844 | Med | 0.32 | 5.9 | 0.04 | Aug 22, 2018 | It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets. | ||
| CVE-2025-69893 | Med | 0.30 | 4.6 | 0.00 | Apr 14, 2026 | A side-channel vulnerability exists in the implementation of BIP-39 mnemonic processing, as observed in Trezor One v1.13.0 to v1.14.0, Trezor T v1.13.0 to v1.14.0, and Trezor Safe v1.13.0 to v1.14.0 hardware wallets. This originates from the BIP-39 standard guidelines, which… | ||
| CVE-2025-7396 | Med | 0.30 | 4.6 | 0.00 | Jul 18, 2025 | In wolfSSL release 5.8.2 blinding support is turned on by default for Curve25519 in applicable builds. The blinding configure option is only for the base C implementation of Curve25519. It is not needed, or available with; ARM assembly builds, Intel assembly builds, and the… | ||
| CVE-2024-23170 | Med | 0.29 | 5.5 | 0.00 | Jan 31, 2024 | An issue was discovered in Mbed TLS 2.x before 2.28.7 and 3.x before 3.5.2. There was a timing side channel in RSA private operations. This side channel could be sufficient for a local attacker to recover the plaintext. It requires the attacker to send a large number of messages… | ||
| CVE-2025-49087 | Med | 0.26 | 4.0 | 0.00 | Jul 20, 2025 | In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used. | ||
| CVE-2024-11862 | Med | 0.26 | — | 0.00 | Nov 27, 2024 | Non constant time cryptographic operation in Devolutions.XTS.NET 2024.11.19 and earlier allows an attacker to render half of the encryption key obsolete via a timing attacks |
- risk 0.38cvss 5.9epss 0.02
A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.
- risk 0.38cvss 5.9epss 0.01
It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is…
- risk 0.36cvss —epss 0.01
SCRAM (Salted Challenge Response Authentication Mechanism) is part of the family of Simple Authentication and Security Layer (SASL, RFC 4422) authentication mechanisms. Prior to version 3.2, a timing attack vulnerability exists in the SCRAM Java implementation. The issue arises…
- risk 0.36cvss 5.5epss 0.00
A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA…
- risk 0.36cvss 5.5epss 0.01
A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.
- risk 0.36cvss 5.6epss 0.00
A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.
- risk 0.35cvss 6.5epss 0.01
Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases…
- risk 0.35cvss 6.5epss 0.02
Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow…
- risk 0.35cvss 5.3epss 0.01
Dell PowerScale OneFS 9.5.0.x through 9.7.0.x contain a covert timing channel vulnerability. A remote unauthenticated attacker could potentially exploit this vulnerability, leading to denial of service.
- risk 0.34cvss 5.3epss 0.00
OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to a Minerva attack, exploitable by measuring the time of signing of random messages using the EVP_DigestSign API, and then using the private key to extract the K value (nonce) from the signatures. Next, based…
- risk 0.33cvss 5.1epss 0.00
In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.
- risk 0.33cvss 5.1epss 0.01
Dell BSAFE Crypto-C Micro Edition, versions before 4.1.5, and Dell BSAFE Micro Edition Suite, versions before 4.6, contain an Observable Timing Discrepancy Vulnerability.
- risk 0.32cvss 5.9epss 0.02
python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.
- risk 0.32cvss 5.9epss 0.04
It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.
- risk 0.32cvss 5.9epss 0.04
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.
- risk 0.30cvss 4.6epss 0.00
A side-channel vulnerability exists in the implementation of BIP-39 mnemonic processing, as observed in Trezor One v1.13.0 to v1.14.0, Trezor T v1.13.0 to v1.14.0, and Trezor Safe v1.13.0 to v1.14.0 hardware wallets. This originates from the BIP-39 standard guidelines, which…
- risk 0.30cvss 4.6epss 0.00
In wolfSSL release 5.8.2 blinding support is turned on by default for Curve25519 in applicable builds. The blinding configure option is only for the base C implementation of Curve25519. It is not needed, or available with; ARM assembly builds, Intel assembly builds, and the…
- risk 0.29cvss 5.5epss 0.00
An issue was discovered in Mbed TLS 2.x before 2.28.7 and 3.x before 3.5.2. There was a timing side channel in RSA private operations. This side channel could be sufficient for a local attacker to recover the plaintext. It requires the attacker to send a large number of messages…
- risk 0.26cvss 4.0epss 0.00
In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.
- risk 0.26cvss —epss 0.00
Non constant time cryptographic operation in Devolutions.XTS.NET 2024.11.19 and earlier allows an attacker to render half of the encryption key obsolete via a timing attacks