CVE-2019-3464

Description

Insufficient sanitization of environment variables passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that should restrict users to perform only rsync operations, resulting in the execution of arbitrary shell commands.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 7.93% Top 10%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: Debian GNU/Linux rssh
Published at:
Updated at:

References

Link Tags
https://www.debian.org/security/2019/dsa-4382 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00007.html third party advisory mailing list
http://www.securityfocus.com/bid/106839 vdb entry third party advisory
https://tracker.debian.org/news/1026713/accepted-rssh-234-5deb9u2-source-amd64-into-stable-embargoed-stable/ third party advisory mailing list
https://usn.ubuntu.com/3946-1/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HO3MDU3AH5SLYBKHH5PJ6PHC63ASIF42/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T42YYNWJZG422GATWAHAEK4A24OKY557/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KR2OHTHMJVV4DO3HDRFQQZ5JENHDJQEN/ vendor advisory
https://security.gentoo.org/glsa/202007-29 third party advisory vendor advisory
http://seclists.org/fulldisclosure/2021/May/78 mailing list not applicable third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-3464?
CVE-2019-3464 has been scored as a critical severity vulnerability.
How to fix CVE-2019-3464?
To fix CVE-2019-3464, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-3464 being actively exploited in the wild?
It is possible that CVE-2019-3464 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-3464?
CVE-2019-3464 affects Debian GNU/Linux rssh.
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