SB2021061815 - Multiple vulnerabilities in Apache Pulsar
Published: June 18, 2021 Updated: July 15, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Code Injection (CVE-ID: CVE-2020-26238)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Insecure Temporary File (CVE-ID: CVE-2020-15250)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to the application is using the test rule TemporaryFolder that stores sensitive information in temporary files in the system temporary directory, accessible by other system users. A local user can read temporary files and obtain sensitive information, related to the application.
3) Incorrect default permissions (CVE-ID: CVE-2020-8908)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect default permissions for files located in the temporary directory set by the Guava com.google.common.io.Files.createTempDir(). A local user with access to the system can view contents of files and directories or modify them.
4) Uncontrolled memory allocation (CVE-ID: CVE-2018-10237)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to unbounded memory allocation. A remote attacker can cause the service to crash and deserialize attacker-provided data, because the AtomicDoubleArray class (when serialized with Java serialization) and the CompoundOrdering class (when serialized with GWT serialization) perform eager allocation without appropriate checks on what a client has sent and whether the data size is reasonable.
5) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-21409)
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests in io.netty:netty-codec-http2 in Netty, if the request only uses a single Http2HeaderFrame with the endStream set to to true. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
6) Buffer overflow (CVE-ID: CVE-2018-12541)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the WebSocket HTTP upgrade implementation. A remote authenticated attacker can trigger memory corruption and cause a denial of service condition on the target system.
7) Input validation error (CVE-ID: CVE-2021-28169)
The vulnerability allows a remote attacker to gain access to sensitive information..
The vulnerability exists due to a double decoding issue when parsing URI with certain characters. A remote attacker can send requests to the ConcatServlet and WelcomeFilter and view contents of protected resources within the WEB-INF directory.
Example:
/concat?/%2557EB-INF/web.xml
Remediation
Install update from vendor's website.