Plataforma
ruby
Componente
aescrypt
Corregido en
1.0.1
CVE-2013-7463 is a high-severity vulnerability affecting the aescrypt Ruby gem versions up to and including 1.0.0. This flaw stems from a failure to randomize the Cipher Block Chaining (CBC) Initialization Vector (IV) during encryption and decryption operations. Consequently, attackers can potentially exploit this weakness through chosen plaintext attacks, compromising the confidentiality of encrypted data.
The core impact of CVE-2013-7463 lies in the potential for chosen plaintext attacks. An attacker, by carefully crafting specific input data, can manipulate the encryption process and recover sensitive information without needing to break the underlying AES encryption algorithm itself. This is because the predictable IV allows the attacker to deduce relationships between plaintext and ciphertext. The data at risk includes any sensitive information encrypted using the vulnerable aescrypt gem, such as passwords, API keys, or personal data. While lateral movement isn't a direct consequence, a successful compromise could lead to data exfiltration and further attacks if the compromised data is used to access other systems.
CVE-2013-7463 was publicly disclosed in 2017. While there are no known active campaigns specifically targeting this vulnerability, the potential for chosen plaintext attacks makes it a significant concern, especially in legacy systems. No public proof-of-concept (PoC) exploits have been widely publicized, but the theoretical attack vector is well understood. It is not listed on the CISA KEV catalog.
Applications and systems that rely on the aescrypt Ruby gem for encryption, particularly those using versions 1.0.0 or earlier, are at risk. This includes older Ruby on Rails applications and any custom Ruby scripts that utilize the gem for data protection. Shared hosting environments where multiple applications might be using the gem are also at increased risk.
• ruby / gem: Check gemfile.lock for aescrypt versions <= 1.0.0. Use gem list aescrypt to identify installed versions.
gem list aescrypt | grep '1.0.0'• ruby / application code: Search code for calls to AESCrypt.encrypt and AESCrypt.decrypt.
• generic / log analysis: Monitor application logs for unusual encryption/decryption patterns or errors related to the aescrypt gem.
discovery
disclosure
Estado del Exploit
EPSS
0.30% (53% percentil)
Vector CVSS
The primary mitigation for CVE-2013-7463 is to upgrade to a patched version of the aescrypt gem. Unfortunately, no official patch was released for the original version. As a workaround, avoid using the aescrypt gem for encrypting sensitive data. If you absolutely must use it, implement strict input validation and consider using a different encryption library with stronger IV randomization. Carefully review any existing code that utilizes the aescrypt gem and replace it with a more secure alternative. There are no specific WAF or proxy rules that can directly address this vulnerability, as it resides within the application code.
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Análisis de vulnerabilidades y alertas críticas directamente en tu correo.
CVE-2013-7463 is a high-severity vulnerability in the aescrypt Ruby gem where the CBC IV is not randomized, allowing attackers to perform chosen plaintext attacks and potentially recover sensitive data.
You are affected if your application uses the aescrypt Ruby gem version 1.0.0 or earlier. Carefully review your gemfile.lock and application code.
Upgrade to a patched version of the aescrypt gem is the recommended fix. However, no official patch was released. Replace the gem with a more secure alternative for encryption.
While no active campaigns are known, the vulnerability's potential for chosen plaintext attacks makes it a significant concern, especially in legacy systems.
There is no official advisory from the aescrypt project. Refer to the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2013-7463) for more information.
Sube tu archivo de dependencias y detecta esta y otras CVEs al instante.
Sube tu archivo Gemfile.lock y te decimos al instante si estás afectado.