OpenVPN -- HMAC verification on source IP address ineffective

Arne Schwabe reports: Fix memcmp check for the hmac verification in the 3way handshake being inverted This is a stupid mistake but causes all hmac cookies to be accepted, thus breaking source IP address validation. As a consequence, TLS sessions can be openend and state can be consumed in the...

EUVD-2016-1610

Malware in sbrugna...

EUVD-2021-11716

Malware in sbrugna...

EUVD-2018-0707

Malware in sbrugna...

CVE-2025-59058

httpsig-rs is a Rust implementation of IETF RFC 9421 http message signatures. Prior to version 0.0.19, the HMAC signature comparison is not timing-safe. This makes anyone who uses HS256 signature verification vulnerable to a timing attack that allows the attacker to forge a signature. Version...

SignXML's signature verification with HMAC is vulnerable to a timing attack

When verifying signatures with X509 certificate validation turned off and HMAC shared secret set signxml.XMLVerifier.verifyrequirex509=False, hmackey=..., prior versions of SignXML are vulnerable to a potential timing attack. The verifier may leak information about the correct HMAC when comparing...

CVE-2025-48995

CVE-2025-48995 affects SignXML (Python implementation of W3C XML Signature) prior to 4.0.4. When verify() is called with require_x509=False and an HMAC secret (hmac_key=...), the timing-based vulnerability may leak information about the correct HMAC during the comparison, enabling reconstruction ...

CVE-2025-48995 SignXML's signature verification with HMAC is vulnerable to a timing attack

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.verifyrequirex509=False, hmackey=..., versions of SignXML prior to 4.0.4 are vulnerable to a potential...

CVE-2025-48994

SignXML (Python) prior to 4.0.4 is vulnerable to an algorithm confusion attack when verifying signatures with require_x509=False and hmac_key is set, allowing an attacker to forge a signature under a different algorithm if the expected signature algorithms are not restricted (verify(expect_config...

CVE-2025-48994 SignXML's signature verification with HMAC is vulnerable to an algorithm confusion attack

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.verifyrequirex509=False, hmackey=..., versions of SignXML prior to 4.0.4 are vulnerable to a potential...

CVE-2025-48994 SignXML's signature verification with HMAC is vulnerable to an algorithm confusion attack

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.verifyrequirex509=False, hmackey=..., versions of SignXML prior to 4.0.4 are vulnerable to a potential...

CVE-2021-32697

neos/forms is an open source framework to build web forms. By crafting a special GET request containing a valid form state, a form can be submitted without invoking any validators. Form state is secured with an HMAC that is still verified. That means that this issue can only be exploited if Form...

CVE-2021-29444

jose-browser-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AESCBCHMACSHA2 Algorithm A128CBC-HS256, A192CBC-HS384, A256CBC-HS512 decryption would always execute both HMAC tag verification and CBC decryption, if either failed...

CVE-2025-31161

CrushFTP 10 before 10.8.4 and 11 before 11.3.1 allows authentication bypass and takeover of the crushadmin account unless a DMZ proxy instance is used, as exploited in the wild in March and April 2025, aka "Unauthenticated HTTPS port access." A race condition exists in the AWS4-HMAC compatible wi...

Linux Distros Unpatched Vulnerability : CVE-2024-37568

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is...

Security Bulletin: authlib-cve202437568-sec-bypass

Summary Authlib security bypass Vulnerability Details CVEID:CVE-2024-37568 DESCRIPTION: Authlib could allow a remote attacker to bypass security restrictions, caused by an algorithm confusion with asymmetric public keys. By sending a specially crafted request, an attacker could exploit this...

MGASA-2024-0238 Updated python-authlib packages fix security vulnerability

Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. This is similar to CVE-2022-29217 and CVE-2024-33663...

Updated python-authlib packages fix security vulnerability

Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. This is similar to CVE-2022-29217 and CVE-2024-33663...

Authentication Bypass

authlib is vulnerable to Authentication Bypass The vulnerability is due to allowing HMAC verification with any asymmetric public key in jwt.decode calls without specifying an algorithm, which attackers can exploit to bypass authentication checks...

SUSE CVE-2024-37568

lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. This is similar to CVE-2022-29217 and CVE-2024-33663...