CVEvulnerability
CVE-2021-36770
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-08-11
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-427
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.
Affected configurations
• p5-encode project p5-encode (>= 3.05 < 3.12)
• fedoraproject fedora 34
• fedoraproject fedora 33
Related
Weakness · CWE (1)
- CWE-427 Uncontrolled Search Path Element weakness
References
- https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9 Patch, Third Party Advisory
- https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74 Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/ lists.fedoraproject.org
- https://metacpan.org/dist/Encode/changes Third Party Advisory
- https://news.cpanel.com/unscheduled-tsr-10-august-2021/ Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-36770 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0003/ Third Party Advisory
- https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9 Patch, Third Party Advisory
- https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74 Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/ lists.fedoraproject.org
- https://metacpan.org/dist/Encode/changes Third Party Advisory
- https://news.cpanel.com/unscheduled-tsr-10-august-2021/ Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-36770 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0003/ Third Party Advisory
- https://security.netapp.com/advisory/ntap-20241108-0002/ security.netapp.com