SB2024022138 - SUSE update for abseil-cpp, grpc, opencensus-proto, protobuf, python-abseil, python-grpcio, re2

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2023-32731)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input when parsing HTTP2 requests. When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. This could lead to requests from the proxy being interpreted as containing headers from different proxy clients, leading to an information leak that can be used for privilege escalation or data exfiltration.

2) Input validation error (CVE-ID: CVE-2023-32732)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and cause a termination of connection between a HTTP2 proxy and a gRPC server.

3) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2023-33953)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

4) Resource exhaustion (CVE-ID: CVE-2023-44487)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improperly control of consumption for internal resources when handling HTTP/2 requests with compressed HEADERS frames. A remote attacker can send a sequence of compressed HEADERS frames followed by RST_STREAM frames and perform a denial of service (DoS) attack, a.k.a. "Rapid Reset".

Note, the vulnerability is being actively exploited in the wild.

5) Resource exhaustion (CVE-ID: CVE-2023-4785)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to lack of error handling in the TCP server in Google's gRPC. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack by initiating a significant number of connections with the server.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2024/suse-su-20240573-1/