Input validation error in ZNC - CVE-2019-9917

Vulnerability identifier: #VU18315

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-9917

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted message in incorrect encoding and cause the application to crash.

ZNC
znc (Alpine package)
znc (Ubuntu package)
znc
Fedora
SUSE Linux
Opensuse
Dell PowerProtect Cyber Recovery

Install updates from vendor's website.

ZNC - update to 1.7.3 rc1
znc (Alpine package) - addressed in versions 1.7.1-r1, 1.7.1-r3
znc (Ubuntu package) - update to 1.7.1-2ubuntu0.1
znc - addressed in versions 1.7.3-1.el7, 1.7.3-1.fc28, 1.7.3-1.fc29, 1.7.3-1.fc30
Dell PowerProtect Cyber Recovery - update to 18.1.1.2-8

• https://github.com/znc/znc/commit/64613bc8b6b4adf1e32231f9844d99cd512b8973
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WTRBTPL7WWKQ7DZ2ALDTCGYUWSE6SL3/

• Denial of service in ZNC
• Ubuntu update for ZNC
• OpenSUSE Linux update for znc
• OpenSUSE Linux update for znc
• OpenSUSE Linux update for znc
• OpenSUSE Linux update for znc
• Input validation error in znc (Alpine package)
• Multiple vulnerabilities in Dell EMC Cyber Recovery
• Fedora EPEL 7 update for znc
• Fedora 30 update for znc
• Fedora 28 update for znc
• Fedora 29 update for znc