CVE-2021-3578 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/ https://bugzilla.redhat.com/show_bug.cgi?id=1961710 http://www.openwall.com/lists/oss-security/2021/06/07/1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U75UFEWRAZYKVL5NHMPBUOLWN3WXTOEI/ https://bugzilla.redhat.com/show_bug.cgi?id=1967397 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RPIDLIJKNRJHUVBCL7QGAPAAVPIHQGXK/ https://www.openwall.com/lists/oss-security/2021/06/07/1

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8