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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9Patch, Third Party Advisory
- https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/
- https://metacpan.org/dist/Encode/changesThird Party Advisory
- https://news.cpanel.com/unscheduled-tsr-10-august-2021/Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-36770Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0003/Third Party Advisory
- https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9Patch, Third Party Advisory
- https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/
- https://metacpan.org/dist/Encode/changesThird Party Advisory
- https://news.cpanel.com/unscheduled-tsr-10-august-2021/Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-36770Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0003/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20241108-0002/
Timeline
- Published
- Aug 11, 2021
- Last modified
- Jun 17, 2026
- NVD status
- Modified