SB2024031538 - Multiple vulnerabilities in IBM CICS TX Standard
Published: March 15, 2024 Updated: January 31, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Inadequate encryption strength (CVE-ID: CVE-2023-48795)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to incorrect implementation of the SSH Binary Packet Protocol (BPP), which mishandles the handshake phase and the use of sequence numbers. A remote attacker can perform MitM attack and delete the SSH2_MSG_EXT_INFO message sent before authentication starts, allowing the attacker to disable a subset of the keystroke timing obfuscation features introduced in OpenSSH 9.5.
The vulnerability was dubbed "Terrapin attack" and it affects both client and server implementations.
2) Resource exhaustion (CVE-ID: CVE-2023-39326)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when handling HTTP chunked requests. A remote attacker can send specially crafted HTTP requests to the server and consume excessive memory resources.
3) Input validation error (CVE-ID: CVE-2023-45284)
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to the IsLocal() function from the path/filepath package does not correctly detect reserved device names in some cases when executed on Windows. Reserved names followed by spaces, such as "COM1 ", and reserved names
"COM" and "LPT" followed by superscript 1, 2, or 3, are incorrectly
reported as local. A local user can abuse such behavior and bypass implemented security restrictions.
4) Input validation error (CVE-ID: CVE-2023-45283)
The vulnerability allows a local user to bypass implemented security restrictions.
5) Missing Encryption of Sensitive Data (CVE-ID: CVE-2023-45285)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to a fallback to insecure git. Using "go get" to fetch a module with the ".git" suffix may unexpectedly fallback to the insecure "git://" protocol if the module is unavailable via the secure "https://" and git+ssh://" protocols, even if GOINSECURE is not set for said module. This only affects users who are not using the module proxy and are fetching modules directly (i.e. OPROXY=off).
Remediation
Install update from vendor's website.