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Servers and applications

CVE-2013-6171

checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentication and access virtual email accounts by attaching to the process and using a restricted file descriptor to modify account information in the response to the dovecot-auth server.

Severity
Medium 5.8
Published
9 Dec 2013
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.5% in the next 30 daysHigher than 73% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper authentication (CWE-287)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
DovecotServers and applications · cpe:a:dovecot:dovecot
  • Version 2.2.5
  • Version 2.2.4
  • Version 2.2.3
  • Version 2.2.2
All 51 release lines
  • Every version up to 2.2.6
  • Version 2.0-beta1
  • Version 2.0.0
  • Version 2.0.1
  • Version 2.0.2
  • Version 2.0.3
  • Version 2.0.4
  • Version 2.0.5
  • Version 2.0.6
  • Version 2.0.7
  • Version 2.0.8
  • Version 2.0.9
  • Version 2.0.10
  • Version 2.0.11
  • Version 2.0.12
  • Version 2.0.13
  • Version 2.0.14
  • Version 2.0.15
  • Version 2.1-rc1
  • Version 2.1-rc2
  • Version 2.1-rc3
  • Version 2.1-rc5
  • Version 2.1-rc6
  • Version 2.1-rc7
  • Version 2.1.0
  • Version 2.1.1
  • Version 2.1.2
  • Version 2.1.3
  • Version 2.1.4
  • Version 2.1.5
  • Version 2.1.6
  • Version 2.1.7
  • Version 2.1.10
  • Version 2.1.11
  • Version 2.1.12
  • Version 2.1.13
  • Version 2.1.14
  • Version 2.1.15
  • Version 2.2-rc1
  • Version 2.2-rc2
  • Version 2.2-rc3
  • Version 2.2-rc4
  • Version 2.2-rc5
  • Version 2.2-rc6
  • Version 2.2-rc7
  • Version 2.2.0
  • Version 2.2.1
  • Version 2.2.2
  • Version 2.2.3
  • Version 2.2.4
  • Version 2.2.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-6171
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-6171