High severity7.8NVD Advisory· Published Aug 11, 2021· Updated Jun 17, 2026
CVE-2021-36770
CVE-2021-36770
Description
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.
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Affected products
6cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- Perl/Encode.pmdescription
- Range: through 5.34.0
- Range: through 5.34.0
Patches
Vulnerability mechanics
References
9- github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9nvdPatchThird Party Advisory
- github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74nvdPatchThird Party Advisory
- metacpan.org/dist/Encode/changesnvdThird Party Advisory
- news.cpanel.com/unscheduled-tsr-10-august-2021/nvdThird Party Advisory
- security-tracker.debian.org/tracker/CVE-2021-36770nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210909-0003/nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/nvd
- security.netapp.com/advisory/ntap-20241108-0002/nvd
News mentions
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