Resource Exhaustion Affecting skopeo-tests package, versions <2:1.11.3-0.2.rhaos4.13.el9


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.04% (14th percentile)

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  • Snyk ID SNYK-RHEL9-SKOPEOTESTS-6815496
  • published 9 May 2024
  • disclosed 3 Apr 2024

How to fix?

Upgrade RHEL:9 skopeo-tests to version 2:1.11.3-0.2.rhaos4.13.el9 or higher.
This issue was patched in RHSA-2024:2049.

NVD Description

Note: Versions mentioned in the description apply only to the upstream skopeo-tests package and not the skopeo-tests package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.

CVSS Scores

version 3.1
Expand this section

Red Hat

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

SUSE

7.5 high