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postgresql: psql's \gset allows overwriting specially treated variables

🗓️ 16 Dec 2020 08:28:24Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Flaw in psql's \gset enables code execution as the psql OS user when querying a compromised server.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64postgresql0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-0:10.15-1.module+el8.3.0+8944+1ca16b1f.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepostgresql0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-0:10.15-1.module+el8.3.0+8944+1ca16b1f.ppc64le.rpm
Red Hat Enterprise Linux8s390xpostgresql0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-0:10.15-1.module+el8.3.0+8944+1ca16b1f.s390x.rpm
Red Hat Enterprise Linux8x86_64postgresql0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-0:10.15-1.module+el8.3.0+8944+1ca16b1f.x86_64.rpm
Red Hat Enterprise Linux8aarch64postgresql-contrib0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-0:10.15-1.module+el8.3.0+8944+1ca16b1f.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepostgresql-contrib0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-0:10.15-1.module+el8.3.0+8944+1ca16b1f.ppc64le.rpm
Red Hat Enterprise Linux8s390xpostgresql-contrib0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-0:10.15-1.module+el8.3.0+8944+1ca16b1f.s390x.rpm
Red Hat Enterprise Linux8x86_64postgresql-contrib0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-0:10.15-1.module+el8.3.0+8944+1ca16b1f.x86_64.rpm
Red Hat Enterprise Linux8aarch64postgresql-contrib-debuginfo0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-debuginfo-0:10.15-1.module+el8.3.0+8944+1ca16b1f.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepostgresql-contrib-debuginfo0:10.15-1.module+el8.3.0+8944+1ca16b1fpostgresql-contrib-debuginfo-0:10.15-1.module+el8.3.0+8944+1ca16b1f.ppc64le.rpm
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28 Jun 2026 09:06Current
7.5High risk
Vulners AI Score7.5
CVSS 3.17.5
CVSS 27.6
EPSS0.02586
3