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almalinuxAlmaLinuxALSA-2020:4756
HistoryNov 03, 2020 - 12:33 p.m.

Moderate: varnish:6 security, bug fix, and enhancement update

2020-11-0312:33:31
errata.almalinux.org
11
varnish cache
http accelerator
memory storage
web server
denial of service
crafted http/1 requests
remote clients
information disclosure
cve-2019-15892
cve-2020-11653
cve-2019-20637
cvss score
almalinux release notes

EPSS

0.042

Percentile

92.4%

Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don’t have to create the same web page over and over again, giving the website a significant speed up.

The following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)

Security Fix(es):

  • varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)

  • varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)

  • varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.