CVE-2025-20127 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software for Firepower 3100 and 4200 Series TLS Cipher Denial of Service Vulnerability

A vulnerability in the TLS 1.3 implementation for a specific cipher for Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software for Cisco Firepower 3100 and 4200 Series devices could allow an authenticated, remote attacker to consume...

CVE-2025-20127

CVE-2025-20127 affects Cisco Secure Firewall ASA/FTD on Firepower 3100 and 4200 Series. The issue stems from TLS 1.3 cipher TLS_CHACHA20_POLY1305_SHA256, allowing an authenticated, remote attacker to exhaust resources tied to incoming TLS 1.3 connections and potentially deny new SSL/TLS or VPN co...

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Firepower 3100 and 4200 Series TLS 1.3 Cipher Denial of Service Vulnerability

A vulnerability in the TLS 1.3 implementation for a specific cipher for Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software for Cisco Firepower 3100 and 4200 Series devices could allow an authenticated, remote attacker to consume...

SUSE-SU-2025:20596-1 Security update for libssh

This update for libssh fixes the following issues: - CVE-2025-5372: sshkdf returns a success code on certain failures bsc1245314 - CVE-2025-5987: Invalid return code for chacha20 poly1305 with OpenSSL backend bsc1245317 - CVE-2025-4877: Write beyond bounds in binary to base64 conversion functions...

PT-2025-33311

Name of the Vulnerable Software and Affected Versions: Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software for Cisco Firepower 3100 and 4200 Series devices affected versions not specified Description: A flaw in the TLS 1.3...

Azure Linux 3.0 Security Update: libssh (CVE-2025-5987)

The version of libssh installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-5987 advisory. - A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to...

CBL Mariner 2.0 Security Update: libssh (CVE-2025-5987)

The version of libssh installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-5987 advisory. - A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to...

Libssh: invalid return code for chacha20 poly1305 with openssl backend

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DEBIAN-CVE-2025-5987

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

AZL-64794 CVE-2025-5987 affecting package libssh for versions less than 0.10.6-2

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

AZL-64797 CVE-2025-5987 affecting package libssh for versions less than 0.10.6-2

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987 Libssh: invalid return code for chacha20 poly1305 with openssl backend

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987

CVE-2025-5987 affects libssh when using ChaCha20 with OpenSSL. Root cause: OpenSSL error codes alias with SSH_OK, causing libssh to miss detection of an error during ChaCha20-Poly1305 key setup, potentially leading to a partially initialized cipher context and undefined behavior that can compromi...

CVE-2025-5987

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987 Libssh: invalid return code for chacha20 poly1305 with openssl backend

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

CVE-2025-5987 Libssh: invalid return code for chacha20 poly1305 with openssl backend

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with th...

USN-7619-1 libssh vulnerabilities

Ronald Crane discovered that libssh incorrectly handled certain base64 conversions. An attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2025-4877 Ronald Crane discovered that libssh incorrectly handled the...