Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isync Project | Isync | < 1.3.6 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/06/07/1Mailing ListPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1961710Not Applicable
- https://bugzilla.redhat.com/show_bug.cgi?id=1967397Issue TrackingPatchThird Party Advisory
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-buNot Applicable
- https://lists.debian.org/debian-lts-announce/2022/07/msg00001.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202208-15Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/07/1Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/06/07/1Mailing ListPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1961710Not Applicable
- https://bugzilla.redhat.com/show_bug.cgi?id=1967397Issue TrackingPatchThird Party Advisory
- https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-buNot Applicable
- https://lists.debian.org/debian-lts-announce/2022/07/msg00001.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-3578?
CVE-2021-3578 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 struc...
How severe is CVE-2021-3578?
CVE-2021-3578 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3578?
Check the references section above for vendor advisories and patch information. Affected products include: Isync Project Isync, Fedoraproject Fedora, Debian Debian Linux.