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Uncontrolled Resource Consumption


Severity Medium
Score 5.5/10


Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL to crash leading to a potential Denial of Service attack Impact summary: Applications loading files in the PKCS12 format from untrusted sources might terminate abruptly. A file in PKCS12 format can contain certificates and keys and may come from an untrusted source. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly check for this case. This can lead to a NULL pointer dereference that results in OpenSSL crashing. If an application processes PKCS12 files from an untrusted source using the OpenSSL APIs then that application will be vulnerable to this issue. OpenSSL APIs that are vulnerable to this are: "PKCS12_parse()", "PKCS12_unpack_p7data()", "PKCS12_unpack_p7encdata()", "PKCS12_unpack_authsafes()" and "PKCS12_newpass()". We have also fixed a similar issue in "SMIME_write_PKCS7()". However since this function is related to writing data we do not consider it security significant. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. This issue affects the versions 1.0.2 through 1.0.2u, 1.1.1 through 1.1.1w, 3.0.0-alpha1 through 3.0.12, 3.1.0-alpha1 through 3.1.4, and openssl-3.2.0-alpha1 through openssl-3.2.0.

  • LOW
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

Advisory Timeline

  • Published