SB2026090540 - openEuler 24.03 LTS SP3 update for openssl

Description

This security bulletin contains information about 3 vulnerabilities.

1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-63074)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to allocation of resources without limits or throttling in OpenSSL CMP extraCerts caching when processing rejected CMP messages containing additional certificates. A remote user can repeatedly send CMP requests with unique extra certificates to cause a denial of service.

The issue affects servers that reuse a single OSSL_CMP_CTX for the lifetime of the server process, allowing the untrusted certificate stack to grow without being expunged after message rejection.

2) NULL pointer dereference (CVE-ID: CVE-2026-63076)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper type validation leading to invalid pointer dereference in OpenSSL CMP password-based protection verification when processing a crafted protectionAlg parameter in a CMP message. A remote attacker can send a specially crafted CMP message to cause a denial of service.

CMP is a specialized feature that must be explicitly enabled, and on the client side exploitation is possible when communicating with a malicious or on-path CMP server.

3) Improper validation of integrity check value (CVE-ID: CVE-2026-75803)

CWE-ID: CWE-354 - Improper Validation of Integrity Check Value

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to bypass integrity checks.

The vulnerability exists due to improper validation of integrity check value in EVP_Cipher() for ChaCha20-Poly1305 and AES-OCB when decrypting an empty ciphertext. A local user can provide a forged empty-ciphertext message with a supplied authentication tag to bypass integrity checks.

The issue occurs when applications use EVP_Cipher() and expect a successful return value to indicate that the AEAD tag was verified.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3625