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Allocation of Resources Without Limits or Throttling Affecting apache2 package, versions <2.4.41-r0

Severity

 Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    3.53% (92nd percentile)

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  • Snyk ID SNYK-ALPINE317-APACHE2-3138778
  • published 13 Aug 2019
  • disclosed 13 Aug 2019
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Introduced: 13 Aug 2019

CVE-2019-9517 Open this link in a new tab
CWE-770 Open this link in a new tab

How to fix?

Upgrade Alpine:3.17 apache2 to version 2.4.41-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Alpine. See How to fix? for Alpine:3.17 relevant fixed versions and status.

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.

References

CVSS Scores

version 3.1
Expand this section

NVD

Recommended
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