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gentooGentoo FoundationGLSA-201908-15
HistoryAug 15, 2019 - 12:00 a.m.

ZNC: Privilege escalation

2019-08-1500:00:00
Gentoo Foundation
security.gentoo.org
10

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.014 Low

EPSS

Percentile

86.7%

Background

ZNC is an advanced IRC bouncer.

Description

It was discovered that ZNC’s “Modules.cpp” allows remote authenticated non-admin users to escalate privileges.

Impact

A remote authenticated attacker could escalate privileges and subsequently execute arbitrary code or conduct a Denial of Service attack.

Workaround

There is no known workaround at this time.

Resolution

All ZNC users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-irc/znc-1.7.4_rc1"
OSVersionArchitecturePackageVersionFilename
Gentooanyallnet-irc/znc< 1.7.4_rc1UNKNOWN

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.014 Low

EPSS

Percentile

86.7%