EULEROS-SA-2026-2456

Summary:

An update for openssl is now available for EulerOS V2.0SP15(x86_64)

EulerOS Security has rated this update as having a security impact of Critical.A Common Vunlnerability Scoring System(CVSS)base score, which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.General:

The OpenSSL toolkit provides support for secure communications between machines. OpenSSL includes a certificate management tool and shared libraries which provide various cryptographic algorithms and protocols.

Security Fix(es):

Issue summary: Applications using RSASVE key encapsulation to establish_x000D_ a secret encryption key can send contents of an uninitialized memory buffer to_x000D_ a malicious peer.x000D x000D Impact summary: The uninitialized buffer might contain sensitive data from the_x000D_ previous execution of the application process which leads to sensitive data_x000D_ leakage to an attacker.x000D x000D RSA_public_encrypt() returns the number of bytes written on success and -1_x000D_ on error. The affected code tests only whether the return value is non-zero.x000D As a result, if RSA encryption fails, encapsulation can still return success to_x000D_ the caller, set the output lengths, and leave the caller to use the contents of_x000D_ the ciphertext buffer as if a valid KEM ciphertext had been produced.x000D x000D If applications use EVP_PKEY_encapsulate() with RSA/RSASVE on an_x000D_ attacker-supplied invalid RSA public key without first validating that key,x000D then this may cause stale or uninitialized contents of the caller-provided_x000D_ ciphertext buffer to be disclosed to the attacker in place of the KEM_x000D_ ciphertext.x000D x000D As a workaround calling EVP_PKEY_public_check() or_x000D_ EVP_PKEY_public_check_quick() before EVP_PKEY_encapsulate() will mitigate_x000D_ the issue.x000D x000D The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are...