SigFlip

¿Qué es? SigFlip es una herramienta para modificar archivos PE firmados con authenticode exe, dll, sys, etc. de forma que no afecte ni rompa la firma authenticode existente; en otras palabras, puedes cambiar el checksum/hash del archivo PE incrustando datos por ejemplo, shellcode sin romper la...

about-hmac

Acerca de HMAC Un ejemplo de implementación básica de HMAC Código de autenticación de mensajes basado en hash usando Flask en Python. ¿Qué es HMAC?! El código de autenticación de mensajes basado en hash HMAC proporciona al servidor y al cliente una clave privada que solo es conocida por ese...

malwarescanner

MalwareScanner Escáner de malware muy básico por comparación de hash A veces puede ser necesario durante una respuesta a incidentes. Si encuentras archivos nuevos o sospechosos durante la respuesta, querrás verificar dónde existen esos archivos en los sistemas. Por lo tanto, es posible que...

CVE-2024-28000

CVE-2024-28000 - LiteSpeed Cache Privilege Escalation PoC !WARNING This repository is intended for educational and research purposes only. Use the provided PoC exclusively on systems you own or have explicit permission to test. Unauthorized access , exploitation, or misuse of any material in this...

Astra Linux – Vulnerability in Linux, Linux 5.10

A issue was discovered in the Linux kernel through version 5.16.11. The mixed IPID assignment method, combined with the hash-based IPID assignment policy, allows an off-path attacker to inject data into a victim’s TCP session or terminate that session...

CVE-2026-71206

Shiori's CheckToken function internal/domains/auth.go validates only the JWT's HMAC signature and returns the embedded claims.Account object unmodified, never re-fetching the account from the database. No session store or token-revocation mechanism exists in the codebase...

UBUNTU-CVE-2026-53501

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace when removing the signature from the URL before validation. Since .replace removes all occurrences of the substring, an attacker can insert...

GHSA-MW3H-QJXJ-6XG9 Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature

HMAC validation bypass via multiple .replace calls when removing URL signature Summary Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace when removing the signature from the URL before validation. Since .replace removes all occurrences of the substring, an attacker can...

CVE-2026-53501

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace when removing the signature from the URL before validation. Since .replace removes all occurrences of the substring, an attacker can insert...

EUVD-2026-51608

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace when removing the signature from the URL before validation. Since .replace removes all occurrences of the substring, an attacker can insert...

Plone < 3.1.8 MitM

The version of Plone installed on the remote host is prior to 3.1.8. It is, therefore, affected by a man-in-the-middle vulnerability. Plone uses invariant data a client username and a server secret when calculating an HMAC-SHA1 value for an authentication cookie, which makes it easier for remote...

SUSE CVE-2026-9537

Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison. The decode method compares the supplied signature to the recomputed HMAC with Perl's eq operator, which stops at the first differing byte, so the comparison time varies with the number of...

CVE-2026-9537 Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison

Mojo::JWT versions before 1.02 for Perl verify HMAC signatures with a non-constant-time string comparison. The decode method compares the supplied signature to the recomputed HMAC with Perl's eq operator, which stops at the first differing byte, so the comparison time varies with the number of...

JLSEC-2026-745 Bleichenbacher padding oracle in PKCS#7 KTRI decryption

Bleichenbacher padding oracle in PKCS7 KTRI decryption. When decrypting PKCS7 EnvelopedData using RSA PKCS1 v1.5 key transport, wolfSSL returned distinguishable error codes depending on whether RSA padding validation failed versus whether the decrypted content was malformed. An attacker able to...

CVE-2026-48747

Summary: CVE-2026-48747 affects Symfony’s Mailomat webhook parser. The MailomatRequestParser::validateSignature() method reads the X-MOM-Webhook-Signature header and passes the wire-provided algorithm directly to hash_hmac(), enabling a signature algorithm downgrade instead of enforcing SHA-256 a...

kernel: crypto: caam - fix overflow on long hmac keys

A flaw was found in the Linux kernel's caam cryptographic accelerator driver. When processing a Hash-based Message Authentication Code HMAC key that exceeds the block size, the driver incorrectly handles memory allocation and copying. This can lead to an overflow, where the system attempts to rea...

PYSEC-2026-2528 joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)

Summary joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None. HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/rfc7518/jwsalgs.py:62-70 feed whatever OctKey.getopkey... produced into hmac.new..., and...

CVE-2026-54736 Phalcon: Non-constant-time HMAC verification in `Encryption\Crypt::decrypt` (timing side-channel)

Phalcon is a high-performance, full-stack PHP framework. Prior to 5.14.1, Phalcon\Encryption\Crypt::decrypt compares the attacker-supplied HMAC tag against the freshly computed HMAC using PHP/Zephir identity comparison, which lowers to a byte-wise comparison that returns early on the first...

CVE-2026-54736 Phalcon: Non-constant-time HMAC verification in `Encryption\Crypt::decrypt` (timing side-channel)

Phalcon is a high-performance, full-stack PHP framework. Prior to 5.14.1, Phalcon\Encryption\Crypt::decrypt compares the attacker-supplied HMAC tag against the freshly computed HMAC using PHP/Zephir identity comparison, which lowers to a byte-wise comparison that returns early on the first...

PT-2026-57320

Name of the Vulnerable Software and Affected Versions Phalcon versions prior to 5.14.1 Description The decrypt function within PhalconEncryptionCrypt uses a byte-wise identity comparison to verify the HMAC tag. Because this comparison returns early upon encountering the first differing byte, it...