7.5

CVE-2017-2669: debian debian_linux Improper Input Validation

CVSS: 7.5v3.0HighModified
AliasesSUSE-SU-2017:1250-1UBUNTU-CVE-2017-2669USN-3258-1
Published 21-06-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-2669 is a high (CVSS 7.5) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 4.46% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
4.46%
0%100%
Low · +0.23 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-06-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

4.46%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

+0.23 pp

From 4.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
4.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse12 products
  • dovecot22&distro=SUSE Linux Enterprise Server 12 SP1< 2.2.29.1-11.1
  • dovecot22&distro=SUSE Linux Enterprise Server 12 SP2< 2.2.29.1-11.1
  • dovecot22&distro=SUSE Linux Enterprise Server for Raspberry Pi 12 SP2< 2.2.29.1-11.1
  • dovecot22&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP1< 2.2.29.1-11.1
  • dovecot22&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP2< 2.2.29.1-11.1
Debian2 products
[unknown]1 product
Dovecot1 product
Ubuntu1 product
  • dovecot< 1:2.2.9-1ubuntu2.1 | < 1:2.2.22-1ubuntu2.3 | < 1:2.2.22-1ubuntu2.4

5 vendors · 17 products

References

16 links
Show all 16 references