CVE-2023-32731 Affecting libgrpc37 package, versions <1.60.0-150400.8.3.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-SLES155-LIBGRPC37-6261675
  • published22 Feb 2024
  • disclosed21 Feb 2024

Introduced: 21 Feb 2024

CVE-2023-32731  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 libgrpc37 to version 1.60.0-150400.8.3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgrpc37 package and not the libgrpc37 package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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

CVSS Scores

version 3.1