CVE-2021-28662

squid: An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6

CVE-2021-28662 is fixed in 7 products on 1 platform, first by squid 4.10-1ubuntu1.4, released May 28, 2021. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
6.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.7176
99th percentile

An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic.

Where it's fixed

ProductFixed inFixReleased
Linux
libecap · RHEL 8 0:1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2021:4292 Nov 9, 2021
libecap · ol 8 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 ELSA-2021-4292 Nov 16, 2021
libecap-devel · RHEL 8 0:1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2021:4292 Nov 9, 2021
libecap-devel · ol 8 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 ELSA-2021-4292 Nov 16, 2021
squid · RHEL 8 7:4.15-1.module+el8.5.0+11469+24c223d9 RHSA-2021:4292 Nov 9, 2021
squid · Ubuntu 20.04 LTS (focal) 4.10-1ubuntu1.4 squid 4.10-1ubuntu1.4 May 28, 2021
squid · ol 8 7:4.15-1.module+el8.5.0+20327+24c223d9 ELSA-2021-4292 Nov 16, 2021
squid-cgi · Ubuntu 20.04 LTS (focal) 4.10-1ubuntu1.4 squid-cgi 4.10-1ubuntu1.4 May 28, 2021
squid-common · Ubuntu 20.04 LTS (focal) 4.10-1ubuntu1.4 squid-common 4.10-1ubuntu1.4 May 28, 2021
squid-purge · Ubuntu 20.04 LTS (focal) 4.10-1ubuntu1.4 squid-purge 4.10-1ubuntu1.4 May 28, 2021
squidclient · Ubuntu 20.04 LTS (focal) 4.10-1ubuntu1.4 squidclient 4.10-1ubuntu1.4 May 28, 2021

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