Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.
The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.
| Link | Tags |
|---|---|
| https://metacpan.org/dist/Encode/changes | third party advisory |
| https://security-tracker.debian.org/tracker/CVE-2021-36770 | third party advisory |
| https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74 | third party advisory patch |
| https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9 | third party advisory patch |
| https://news.cpanel.com/unscheduled-tsr-10-august-2021/ | third party advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/ | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/ | vendor advisory |
| https://security.netapp.com/advisory/ntap-20210909-0003/ | third party advisory |