Excessive Iteration Affecting olcne-agent package, versions <0:1.2.5-2.el7


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.12% (46th percentile)

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  • Snyk ID SNYK-ORACLE7-OLCNEAGENT-2600150
  • published 10 Apr 2022
  • disclosed 24 Aug 2021

How to fix?

Upgrade Oracle:7 olcne-agent to version 0:1.2.5-2.el7 or higher.
This issue was patched in ELSA-2021-9525.

NVD Description

Note: Versions mentioned in the description apply only to the upstream olcne-agent package and not the olcne-agent package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.

CVSS Scores

version 3.1
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NVD

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
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Red Hat

7.5 high