SB2023061611 - Multiple vulnerabilities in IBM PowerSC
Published: June 16, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 11 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2023-27534)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied input in the SFTP support when handling the tilde "~" character in the filepath. cURL will replace the tilde character to the current user's home directory and can reveal otherwise restricted files.
2) Use-after-free (CVE-ID: CVE-2022-43552)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error while processing denied requests from HTTP proxies when using SMB or TELNET protocols. A remote attacker can trigger a use-after-free error and crash the application.
3) Cleartext transmission of sensitive information (CVE-ID: CVE-2023-23914)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to state issues when handling multiple requests, which results in ignoring HSTS support. A remote attacker can perform MitM attack.4) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2023-23916)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect implementation of the "chained" HTTP compression algorithms, where the number of links in the decompression chain was limited for each header instead of the entire request. A remote attacker can send a specially crafted compressed HTTP request with numerous headers and perform a denial of service (DoS) attack.
5) Input validation error (CVE-ID: CVE-2023-27533)
The vulnerability allows a remote attacker to manipulate requests.
The vulnerability exists due to missing documentation of the TELNET protocol support and the ability to pass on user name and "telnet options" for the server negotiation. A remote attacker can manipulate the connection sending unexpected data to the server via the affected client.
6) Cleartext transmission of sensitive information (CVE-ID: CVE-2023-23915)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to state issues when handling multiple transfers in parallel, which results in ignoring HSTS support. A remote attacker can perform MitM attack.7) State Issues (CVE-ID: CVE-2023-27536)
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to cURL will reuse a previously created connection even when the GSS delegation (CURLOPT_GSSAPI_DELEGATION) option had been changed that could have changed the user's permissions in a second transfer. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, this GSS delegation setting was left out from the configuration match checks, making them match too easily, affecting krb5/kerberos/negotiate/GSSAPI transfers.
8) Security features bypass (CVE-ID: CVE-2022-43551)
The vulnerability allows an attacker to gain access to sensitive information.
The vulnerability exists in the way curl handles IDN characters in hostnames. The HSTS mechanism could be bypassed if the hostname in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Then in a subsequent request it does not detect the HSTS state and makes a clear text transfer.
9) Double Free (CVE-ID: CVE-2023-27537)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when sharing HSTS data between connection. A remote attacker can initiate HSTS connection, trigger a double free error and execute arbitrary code on the target system.
10) State Issues (CVE-ID: CVE-2023-27535)
The vulnerability allows a remote attacker to gain unauthorized access to FTP server.
The vulnerability exists due to cURL will reuse a previously created FTP connection even when one or more options had been changed that could have made the effective user a very different one. A remote attacker can connect to the FTP server using credentials supplied by another user and gain access to otherwise restricted functionality.
The settings in questions are CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC and CURLOPT_USE_SSL level.
11) Information disclosure (CVE-ID: CVE-2023-27538)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the way libcurl handles previously used connections in a connection pool for subsequent transfers. Several SSH settings were left out from the configuration match checks, resulting in erroneous matches for different resources. As a result, libcurl can send authentication string from one resource to another, exposing credentials to a third-party.Remediation
Install update from vendor's website.