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CVE-2021-3578

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Date: February 16, 2022

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.

Language: C

Severity Score

Related Resources (17)

https://www.openwall.com/lists/oss-security/2021/06/07/1
https://security.gentoo.org/glsa/202208-15
https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/
https://bugzilla.redhat.com/show_bug.cgi?id=1967397
https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U75UFEWRAZYKVL5NHMPBUOLWN3WXTOEI/
http://www.openwall.com/lists/oss-security/2021/06/07/1
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U75UFEWRAZYKVL5NHMPBUOLWN3WXTOEI/
https://sourceforge.net/p/isync/mailman/message/37297759/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RPIDLIJKNRJHUVBCL7QGAPAAVPIHQGXK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RPIDLIJKNRJHUVBCL7QGAPAAVPIHQGXK/
https://security-tracker.debian.org/tracker/CVE-2021-3578
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3578
https://security.alpinelinux.org/vuln/CVE-2021-3578
https://nvd.nist.gov/vuln/detail/CVE-2021-3578
https://bugzilla.redhat.com/show_bug.cgi?id=1961710
https://www.mend.io/vulnerability-database/CVE-2021-3578

Severity Score

Weakness Type (CWE)

Incorrect Type Conversion or Cast

CWE-704

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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