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ruby: Regular expression denial of service vulnerability of WEBrick's Digest authentication

🗓️ 29 Jun 2021 16:24:08Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Vulnerability in Ruby web server digest authentication enables denial of service via regex backtracking in certain versions.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64ruby0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.aarch64.rpm
Red Hat Enterprise Linux8ppc64leruby0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.ppc64le.rpm
Red Hat Enterprise Linux8s390xruby0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.s390x.rpm
Red Hat Enterprise Linux8x86_64ruby0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.x86_64.rpm
Red Hat Enterprise Linux8anyruby0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.i686ruby-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.i686.noarch.rpm
Red Hat Enterprise Linux8aarch64ruby-debuginfo0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-debuginfo-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.aarch64.rpm
Red Hat Enterprise Linux8ppc64leruby-debuginfo0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-debuginfo-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.ppc64le.rpm
Red Hat Enterprise Linux8s390xruby-debuginfo0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-debuginfo-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.s390x.rpm
Red Hat Enterprise Linux8x86_64ruby-debuginfo0:2.5.9-107.module+el8.4.0+10822+fe4fffb1ruby-debuginfo-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.x86_64.rpm
Red Hat Enterprise Linux8anyruby-debuginfo0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.i686ruby-debuginfo-0:2.5.9-107.module+el8.4.0+10822+fe4fffb1.i686.noarch.rpm
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28 Jun 2026 09:07Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.5
CVSS 27.8
EPSS0.05128
3