CVE-2008-4577

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive...

7.5 HighFix available

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

2.33%Down 0.4 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: CVE-2008-4577
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 6.4 MediumAV:N/AC:L/Au:N/C:P/I:P/A:N
Weakness: CWE-863
Updated: 2026-11-02

CVE List No score

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: CVE-2008-4577
Updated: 2026-11-02

EUVDEUVD-2008-4557 No score

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: EUVD-2008-4557
Updated: 2026-11-03

GitHub AdvisoriesGHSA-24jq-h48j-g592 7.5

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive...

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: GHSA-24jq-h48j-g592
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-863
Updated: 2026-11-02

OSV 7.5

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: CVE-2008-4577
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2008-4577 7.5

The ACL plugin in Dovecot before 1.1.4 treats negative access rights as if they are positive access rights, which allows attackers to bypass intended access restrictions.

Record: DEBIAN-CVE-2008-4577
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`dovecot` Debian:12	before 1:1.0.15-2.2	1:1.0.15-2.2
`dovecot` Debian:13	before 1:1.0.15-2.2	1:1.0.15-2.2
`dovecot` Debian:14	before 1:1.0.15-2.2	1:1.0.15-2.2
`dovecot` Red Hat:enterprise_linux:5::client_workstation From an advisory covering 2 CVEs	before 0:1.0.7-7.el5	0:1.0.7-7.el5
`dovecot-debuginfo` Red Hat:enterprise_linux:5::client_workstation From an advisory covering 2 CVEs	before 0:1.0.7-7.el5	0:1.0.7-7.el5
`dovecot` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:1.0.7-7.el5	0:1.0.7-7.el5
`dovecot-debuginfo` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:1.0.7-7.el5	0:1.0.7-7.el5

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2008-4577 is a high vulnerability (CVSS 7.5) in Dovecot, published October 15, 2008. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.33%, the 83rd percentile. Fixed in dovecot 1:1.0.15-2.2.

References

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