Detections
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Amazon Linux 2023 : grpc, grpc-cpp, grpc-data (ALAS2023-2023-282)
critical Nessus Plugin ID 179767
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Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-282 advisory.2023-10-12: CVE-2023-4785 was added to this advisory.
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. If leveraged, say, between a proxy and a backend, 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. We recommend upgrading beyond the commit contained in https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005 (CVE-2023-32731)
gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url (CVE-2023-32732)
Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected. (CVE-2023-4785)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update grpc --releasever 2023.1.20230809' to update your system.See Also
https://alas.aws.amazon.com/AL2023/ALAS-2023-282.html
https://alas.aws.amazon.com/faqs.html
https://alas.aws.amazon.com/cve/html/CVE-2023-32731.html
Plugin Details
Severity: Critical
ID: 179767
File Name: al2023_ALAS2023-2023-282.nasl
Version: 1.2
Type: local
Agent: unix
Published: 8/14/2023
Updated: 12/11/2024
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
CVSS Score Source: CVE-2023-32731
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2023-4785
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:grpc-devel, p-cpe:/a:amazon:linux:grpc-debugsource, p-cpe:/a:amazon:linux:grpc-doc, p-cpe:/a:amazon:linux:grpc-plugins, p-cpe:/a:amazon:linux:grpc-plugins-debuginfo, p-cpe:/a:amazon:linux:grpc, p-cpe:/a:amazon:linux:grpc-cpp-debuginfo, p-cpe:/a:amazon:linux:grpc-data, p-cpe:/a:amazon:linux:grpc-cpp, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:grpc-debuginfo
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 8/3/2023
Vulnerability Publication Date: 6/9/2023