CWE-208
Observable Timing Discrepancy
Description
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
Hierarchy (View 1000)
Related attack patterns (CAPEC)
CAPEC-462 · CAPEC-541 · CAPEC-580
CVEs mapped to this weakness (195)
page 3 of 10| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2020-1926 | Med | 0.39 | 5.9 | 0.02 | Mar 16, 2021 | Apache Hive cookie signature verification used a non constant time comparison which is known to be vulnerable to timing attacks. This could allow recovery of another users cookie signature. The issue was addressed in Apache Hive 2.3.8 | ||
| CVE-2019-9494 | Med | 0.39 | 5.9 | 0.04 | Apr 17, 2019 | The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full… | ||
| CVE-2026-16459 | Med | 0.38 | — | 0.00 | Aug 13, 2026 | Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 2.1.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations. | ||
| CVE-2026-16458 | Med | 0.38 | — | 0.00 | Aug 13, 2026 | Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.0.0 and prior to 4.0.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations. | ||
| CVE-2026-6727 | Med | 0.38 | 5.9 | 0.00 | Aug 11, 2026 | A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to… | ||
| CVE-2026-54411 | Med | 0.38 | 5.9 | 0.00 | Jun 14, 2026 | Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling… | ||
| CVE-2017-20240 | — | Med | 0.38 | 5.9 | 0.00 | Jun 12, 2026 | Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key. | |
| CVE-2026-44368 | Med | 0.38 | — | 0.00 | May 13, 2026 | PyQuorum is a cryptographic library for secret sharing and key management. Prior to 0.2.1, the mul_mod function implements multiplication via a binary expansion loop whose execution time depends on the Hamming weight of the second operand (the exponent). An attacker who can… | ||
| CVE-2026-3337 | Med | 0.38 | 5.9 | 0.01 | Mar 2, 2026 | Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and… | ||
| CVE-2025-7383 | Med | 0.38 | — | 0.00 | Aug 29, 2025 | Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 1.5.1 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations. | ||
| CVE-2025-7071 | Med | 0.38 | — | 0.00 | Aug 29, 2025 | Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations. | ||
| CVE-2025-48995 | Med | 0.38 | — | 0.00 | Jun 2, 2025 | SignXML is an implementation of the W3C XML Signature standard in Python. When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (`signxml.XMLVerifier.verify(require_x509=False, hmac_key=...`), versions of SignXML prior to 4.0.4 are… | ||
| CVE-2025-29780 | Med | 0.38 | — | 0.00 | Mar 14, 2025 | Post-Quantum Secure Feldman's Verifiable Secret Sharing provides a Python implementation of Feldman's Verifiable Secret Sharing (VSS) scheme. In versions 0.8.0b2 and prior, the `feldman_vss` library contains timing side-channel vulnerabilities in its matrix operations,… | ||
| CVE-2024-31074 | Med | 0.38 | 5.9 | 0.01 | Nov 13, 2024 | Observable timing discrepancy in some Intel(R) QAT Engine for OpenSSL software before version v1.6.1 may allow information disclosure via network access. | ||
| CVE-2024-2467 | Med | 0.38 | 5.9 | 0.01 | Apr 25, 2024 | A timing-based side-channel flaw exists in the perl-Crypt-OpenSSL-RSA package, which could be sufficient to recover plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial… | ||
| CVE-2024-3296 | Med | 0.38 | 5.9 | 0.00 | Apr 4, 2024 | A timing-based side-channel flaw exists in the rust-openssl package, which could be sufficient to recover a plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial messages… | ||
| CVE-2024-0202 | Med | 0.38 | 5.9 | 0.00 | Feb 5, 2024 | A security vulnerability has been identified in the cryptlib cryptographic library when cryptlib is compiled with the support for RSA key exchange ciphersuites in TLS (by setting the USE_RSA_SUITES define), it will be vulnerable to the timing variant of the Bleichenbacher… | ||
| CVE-2021-21575 | Med | 0.38 | 5.9 | 0.01 | Feb 2, 2024 | Dell BSAFE Micro Edition Suite, versions before 4.5.2, contain an Observable Timing Discrepancy Vulnerability. | ||
| CVE-2023-5981 | Med | 0.38 | 5.9 | 0.01 | Nov 28, 2023 | A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding. | ||
| CVE-2021-29446 | Med | 0.38 | 5.9 | 0.01 | Apr 16, 2021 | jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if… |
- risk 0.39cvss 5.9epss 0.02
Apache Hive cookie signature verification used a non constant time comparison which is known to be vulnerable to timing attacks. This could allow recovery of another users cookie signature. The issue was addressed in Apache Hive 2.3.8
- risk 0.39cvss 5.9epss 0.04
The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full…
- risk 0.38cvss —epss 0.00
Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 2.1.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
- risk 0.38cvss —epss 0.00
Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.0.0 and prior to 4.0.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
- risk 0.38cvss 5.9epss 0.00
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to…
- risk 0.38cvss 5.9epss 0.00
Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling…
- risk 0.38cvss 5.9epss 0.00
Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.
- risk 0.38cvss —epss 0.00
PyQuorum is a cryptographic library for secret sharing and key management. Prior to 0.2.1, the mul_mod function implements multiplication via a binary expansion loop whose execution time depends on the Hamming weight of the second operand (the exponent). An attacker who can…
- risk 0.38cvss 5.9epss 0.01
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis. The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and…
- risk 0.38cvss —epss 0.00
Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 1.5.1 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.
- risk 0.38cvss —epss 0.00
Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.
- risk 0.38cvss —epss 0.00
SignXML is an implementation of the W3C XML Signature standard in Python. When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (`signxml.XMLVerifier.verify(require_x509=False, hmac_key=...`), versions of SignXML prior to 4.0.4 are…
- risk 0.38cvss —epss 0.00
Post-Quantum Secure Feldman's Verifiable Secret Sharing provides a Python implementation of Feldman's Verifiable Secret Sharing (VSS) scheme. In versions 0.8.0b2 and prior, the `feldman_vss` library contains timing side-channel vulnerabilities in its matrix operations,…
- risk 0.38cvss 5.9epss 0.01
Observable timing discrepancy in some Intel(R) QAT Engine for OpenSSL software before version v1.6.1 may allow information disclosure via network access.
- risk 0.38cvss 5.9epss 0.01
A timing-based side-channel flaw exists in the perl-Crypt-OpenSSL-RSA package, which could be sufficient to recover plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial…
- risk 0.38cvss 5.9epss 0.00
A timing-based side-channel flaw exists in the rust-openssl package, which could be sufficient to recover a plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial messages…
- risk 0.38cvss 5.9epss 0.00
A security vulnerability has been identified in the cryptlib cryptographic library when cryptlib is compiled with the support for RSA key exchange ciphersuites in TLS (by setting the USE_RSA_SUITES define), it will be vulnerable to the timing variant of the Bleichenbacher…
- risk 0.38cvss 5.9epss 0.01
Dell BSAFE Micro Edition Suite, versions before 4.5.2, contain an Observable Timing Discrepancy Vulnerability.
- risk 0.38cvss 5.9epss 0.01
A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.
- risk 0.38cvss 5.9epss 0.01
jose-node-cjs-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if…