vulnwire
3.7low

CVE-2017-2669

Dovecot before version 2.2.29 is vulnerable to a denial of service.

Published 8 y ago · modified 4 mo ago · JSON

CVSS
3.7
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
4.3%
percentile 91%
Public exploits
0
none known

Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.

Exploit prediction (EPSS)

4.31% probability of exploitation in the next 30 days, higher than 91% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.03.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA3.03.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • [UNKNOWN] dovecot

Classification

Weakness
  • CWE-20 Improper Input Validation

References

  • dovecot.org /pipermail/dovecot-news/2017-April/000341.html · mailing-list, x_refsource_MLIST, x_transferred
  • openwall.com /lists/oss-security/2017/04/11/1 · mailing-list, x_refsource_MLIST, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=CVE-2017-2669 · x_refsource_CONFIRM, x_transferred
  • github.com /dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-3828 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securityfocus.com /bid/97536 · vdb-entry, x_refsource_BID, x_transferred

Sources

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