Medium severity · published Aug 22, 2017
CVE-2017-12843
Cyrus IMAP before 3.0.3 allows remote authenticated users to write to arbitrary files via a crafted (1) SYNCAPPLY, (2) SYNCGET or (3) SYNCRESTORE command
6.5
CVSS
1.2%
EPSS
No
On KEV
Description
Cyrus IMAP before 3.0.3 allows remote authenticated users to write to arbitrary files via a crafted (1) SYNCAPPLY, (2) SYNCGET or (3) SYNCRESTORE command.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cyrus Imap · Cyrusimap
through 3.0.2 · source: NVD
FE
Fedora · Fedoraproject
26 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-12843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-12843
Third Party Advisory
https://github.com/cyrusimap/cyrus-imapd/commit/53c4137bd924b954432c6c59da7572c4c5ffa901
Third Party Advisory
https://github.com/cyrusimap/cyrus-imapd/commit/5edadcfb83bf27107578830801817f9e6d0ad941
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6M32R5QPCCNT57BVH3NPV5WVJFSTDP7Q/
Release Notes
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.3.html
More from Cyrus Imap
7.1
CVE-2026-61915
An issue was discovered in Cyrus IMAP before 3.12.4
6.5
CVE-2026-61908
An issue was discovered in Cyrus IMAP before 3.12.4
6.5
CVE-2026-47084
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2
6.5
CVE-2024-34055
Cyrus IMAP before 3.8.3 and 3.10.x before 3.10.0-rc1 allows authenticated attackers to cause unbounded memory allocation by sending many LITERALs in a single command
5.4
CVE-2026-47082
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2