Resource Exhaustion Affecting jbcs-httpd24-nghttp2-devel package, versions <0:1.39.2-4.jbcs.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.99% (89th percentile)

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  • Snyk IDSNYK-RHEL7-JBCSHTTPD24NGHTTP2DEVEL-3623968
  • published26 Jul 2021
  • disclosed13 Aug 2019

Introduced: 13 Aug 2019

CVE-2019-9516  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade RHEL:7 jbcs-httpd24-nghttp2-devel to version 0:1.39.2-4.jbcs.el7 or higher.
This issue was patched in RHSA-2019:3933.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jbcs-httpd24-nghttp2-devel package and not the jbcs-httpd24-nghttp2-devel package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

References

CVSS Scores

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