PT-2023-4872 · Grpc+3 · Grpc+3

Chenqi1989 · Published 2023-04-18 · Updated 2026-02-18 · CVE-2023-32732

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions gRPC (affected versions not specified)

Description The issue is related to a base64 encoding error for -bin suffixed headers, which can cause a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. This can be exploited by a client to terminate the connection between a HTTP2 proxy and a gRPC server.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Weakness Enumeration

CWE-440

Related Identifiers

ALT-PU-2023-1631

BDU:2023-05359

CVE-2023-32732

ECHO-1C5E-F030-6B00

GHSA-9HXF-PPJV-W6RQ

OPENSUSE-SU-2024:13621-1

OPENSUSE-SU-2024:13634-1

OPENSUSE-SU-2024_0573-1

SUSE-SU-2024:0573-1

Affected Products

Alt Linux

Debian

Suse

Grpc

References · 38

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-32732.yml · Exploit
• https://github.com/grpc/grpc/pull/32309 · Patch
• https://security-tracker.debian.org/tracker/CVE-2023-32732 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-32732 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-32732 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-32732 · Security Note
• https://bdu.fstec.ru/vul/2023-05359 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/VWE44J5FG7THHL7XVEVTNIGEYBNKJBLL · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-32732 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-32732 · Security Note
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/37IDNVY5AWVH7JDMM2SDTL24ZPPZJNSY · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-32732 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-32732 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-9hxf-ppjv-w6rq · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:0573-1 · Vendor Advisory