In NetKit through 0.17, rcp.c in the rcp client allows remote rsh servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. This is similar to CVE-2018-20685.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Netkit | Netkit | * | 0.17 (including) |
| Netkit-rsh | Ubuntu | bionic | * |
| Netkit-rsh | Ubuntu | cosmic | * |
| Netkit-rsh | Ubuntu | disco | * |
| Netkit-rsh | Ubuntu | eoan | * |
| Netkit-rsh | Ubuntu | esm-apps/bionic | * |
| Netkit-rsh | Ubuntu | esm-apps/xenial | * |
| Netkit-rsh | Ubuntu | trusty | * |
| Netkit-rsh | Ubuntu | upstream | * |
| Netkit-rsh | Ubuntu | xenial | * |
References
- https://bugs.debian.org/920486
- https://lists.debian.org/debian-lts-announce/2021/11/msg00016.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DU33YVEDGFDMAZPSRQTRVKSKG4FAX7QB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FSEX3TKX2DBUKG4A7VJFDLSMZIBJQZ3G/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NA24VQJATZWYV42JG2PQUW7IHIZS7UKP/
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
- https://bugs.debian.org/920486
- https://lists.debian.org/debian-lts-announce/2021/11/msg00016.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DU33YVEDGFDMAZPSRQTRVKSKG4FAX7QB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FSEX3TKX2DBUKG4A7VJFDLSMZIBJQZ3G/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NA24VQJATZWYV42JG2PQUW7IHIZS7UKP/
- https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt