cbcvebase.
CVE-2022-3358
published 2022-10-11

CVE-2022-3358: OpenSSL supports creating a custom cipher via the legacy EVP_CIPHER_meth_new() function and associated function calls. This function was deprecated in OpenSSL…

PriorityP351high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EXPLOIT
EPSS
2.85%
84.9th percentile
OpenSSL supports creating a custom cipher via the legacy EVP_CIPHER_meth_new() function and associated function calls. This function was deprecated in OpenSSL 3.0 and application authors are instead encouraged to use the new provider mechanism in order to implement custom ciphers. OpenSSL versions 3.0.0 to 3.0.5 incorrectly handle legacy custom ciphers passed to the EVP_EncryptInit_ex2(), EVP_DecryptInit_ex2() and EVP_CipherInit_ex2() functions (as well as other similarly named encryption and decryption initialisation functions). Instead of using the custom cipher directly it incorrectly tries to fetch an equivalent cipher from the available providers. An equivalent cipher is found based on the NID passed to EVP_CIPHER_meth_new(). This NID is supposed to represent the unique NID for a given cipher. However it is possible for an application to incorrectly pass NID_undef as this value in the call to EVP_CIPHER_meth_new(). When NID_undef is used in this way the OpenSSL encryption/decryption initialisation function will match the NULL cipher as being equivalent and will fetch this from the available providers. This will succeed if the default provider has been loaded (or if a third party provider has been loaded that offers this cipher). Using the NULL cipher means that the plaintext is emitted as the ciphertext. Applications are only affected by this issue if they call EVP_CIPHER_meth_new() using NID_undef and subsequently use it in a call to an encryption/decryption initialisation function. Applications that only use SSL/TLS are not impacted by this issue. Fixed in OpenSSL 3.0.6 (Affected 3.0.0-3.0.5).

Affected

9 ranges
VendorProductVersion rangeFixed in
debianopenssl< openssl 3.0.7-1 (bookworm)openssl 3.0.7-1 (bookworm)
horovodhorovod>= 0 < 0.24.00.24.0
opensslopenssl
opensslopenssl>= 0 < 3.0.7-13.0.7-1
opensslopenssl>= 0 < 3.0.7-13.0.7-1
opensslopenssl>= 0 < 3.0.7-13.0.7-1
opensslopenssl>= 0 < 3.0.2-0ubuntu1.73.0.2-0ubuntu1.7
opensslopenssl>= 3.0.0 < 3.0.63.0.6
paloaltopan-os

Detection & IOCsextracted from sources · hover to see the quote

  • Applications calling EVP_CIPHER_meth_new() with NID_undef and passing the result to encryption/decryption init functions (EVP_EncryptInit_ex2, EVP_DecryptInit_ex2, EVP_CipherInit_ex2) will silently use the NULL cipher, emitting plaintext as ciphertext — audit code or logs for unexpected unencrypted traffic from OpenSSL 3.0.0–3.0.5 applications.
  • Affected OpenSSL versions are strictly 3.0.0 through 3.0.5; OpenSSL 1.0.x (shipped in RHEL 6/7/8) does not contain the vulnerable code path and is not affected.
  • SSL/TLS-only applications are not affected; focus detection efforts on applications using the legacy EVP_CIPHER_meth_new() API directly with custom cipher implementations.
  • The NULL cipher will only be fetched (and the vulnerability triggered) if the default OpenSSL provider or a third-party provider offering the NULL cipher has been loaded — check provider configuration in affected deployments.
  • ·Red Hat Enterprise Linux 6, 7, and 8 ship OpenSSL 1.0 which does not contain the vulnerable code and are not affected.
  • ·The vulnerability only manifests when an application incorrectly passes NID_undef to EVP_CIPHER_meth_new(); correctly implemented custom ciphers using valid NIDs are not affected.

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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