CVE-2021-3578

Description

A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.50%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a isync
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2021/06/07/1 mailing list third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U75UFEWRAZYKVL5NHMPBUOLWN3WXTOEI/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RPIDLIJKNRJHUVBCL7QGAPAAVPIHQGXK/ vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1961710 not applicable
https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/ not applicable
https://bugzilla.redhat.com/show_bug.cgi?id=1967397 issue tracking third party advisory patch
https://www.openwall.com/lists/oss-security/2021/06/07/1 mailing list third party advisory patch
https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html third party advisory mailing list
https://security.gentoo.org/glsa/202208-15 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3578?
CVE-2021-3578 has been scored as a high severity vulnerability.
How to fix CVE-2021-3578?
To fix CVE-2021-3578, 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-2021-3578 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3578 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3578?
CVE-2021-3578 affects n/a isync.
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