vulnerability
Arch Linux: Directory traversal (CVE-2021-36770)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Aug 11, 2021 | Jul 11, 2025 | Nov 27, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Aug 11, 2021
Added
Jul 11, 2025
Modified
Nov 27, 2025
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.
Solution
arch-linux-upgrade-latest
References
- CVE-2021-36770
- https://attackerkb.com/topics/CVE-2021-36770
- URL-https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9
- URL-https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74
- URL-https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/
- URL-https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/
- URL-https://metacpan.org/dist/Encode/changes
- URL-https://news.cpanel.com/unscheduled-tsr-10-august-2021/
- URL-https://security-tracker.debian.org/tracker/CVE-2021-36770
- URL-https://security.netapp.com/advisory/ntap-20210909-0003/
- CWE-427
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