Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2020-29260

Uncontrolled Resource Consumption

Published: Sep 02, 2022 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-29260
CWEhttps://cwe.mitre.org/data/definitions/400.html

libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup().

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

NameVendorStart VersionEnd Version
LibvncserverLibvncserver_project0.9.13 (including)0.9.13 (including)
ItalcUbuntubionic*
ItalcUbuntutrusty*
ItalcUbuntuxenial*
LibvncserverUbuntubionic*
LibvncserverUbuntufocal*
LibvncserverUbuntukinetic*
LibvncserverUbuntulunar*
LibvncserverUbuntumantic*
LibvncserverUbuntuoracular*
LibvncserverUbuntuplucky*
LibvncserverUbuntutrusty*
LibvncserverUbuntuxenial*
TightvncUbuntubionic*
TightvncUbuntufocal*
TightvncUbuntukinetic*
TightvncUbuntulunar*
TightvncUbuntumantic*
TightvncUbuntuoracular*
TightvncUbuntuplucky*
TightvncUbuntutrusty*
TightvncUbuntutrusty/esm*
TightvncUbuntuxenial*
VeyonUbuntufocal*
VeyonUbuntukinetic*
VeyonUbuntulunar*
VeyonUbuntumantic*
VeyonUbuntuoracular*
VeyonUbuntuplucky*
VeyonUbuntutrusty*
VeyonUbuntuxenial*
VinoUbuntutrusty*
VinoUbuntuxenial*
X11vncUbuntubionic*
X11vncUbuntufocal*
X11vncUbuntukinetic*
X11vncUbuntulunar*
X11vncUbuntumantic*
X11vncUbuntuoracular*
X11vncUbuntuplucky*
X11vncUbuntutrusty*
X11vncUbuntutrusty/esm*
X11vncUbuntuxenial*

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References

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