SB2026033122 - Ubuntu update for bouncycastle
Published: March 31, 2026 Updated: May 25, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) LDAP injection (CVE-ID: CVE-2023-33201)
CWE-ID: CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to improper input validation in applications that use an LDAP CertStore from Bouncy Castle to validate X.509 certificates. During the certificate validation process, Bouncy Castle inserts the certificate's Subject Name into an LDAP search filter without any escaping, which leads to an LDAP injection vulnerability. A remote non-authenticated attacker can use a specially crafted X.509 certificate to bypass authentication process and gain unauthorized access to the application.
2) Resource exhaustion (CVE-ID: CVE-2024-29857)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 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/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to library does not properly control consumption of internal resources when importing an EC certificate with specially crafted F2m parameters. A remote attacker can pass a specially crafted certificate to the application to trigger resource exhaustion and perform a denial of service (DoS) attack.
3) Observable discrepancy (CVE-ID: CVE-2024-30171)
CWE-ID: CWE-203 - Observable discrepancy
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a possible timing based leakage in RSA based handshakes. A remote attacker can gain access to sensitive information.
4) Insufficient verification of data authenticity (CVE-ID: CVE-2024-34447)
CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to hostname verification is performed against a DNS-resolved IP address when endpoint identification is enabled in the BCJSSE and an SSL socket is not created with an explicit hostname. A remote attacker can bypass implemented security restrictions.
5) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2025-8916)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to improper resource allocation. A remote attacker can library to consume excessive resources and perform a denial of service attack.
6) Infinite loop (CVE-ID: CVE-2024-30172)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: 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/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the Ed25519 verification code. A remote attacker can pass a specially signature and public key to the application, consume all available system resources and cause denial of service conditions.
Remediation
Install update from vendor's website.