Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-31535 |
CWE-ID | CWE-20 |
Exploitation vector | Local |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
libx11 Other software / Other software solutions |
Vendor | xorg.freedesktop.org |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 19.05.2021
Added additional link to researcher's advisory.
EUVDB-ID: #VU53336
Risk: Low
CVSSv3.1: 3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-31535
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of color names within the XLookupColor() function. A local user can run a specially crafted application on the system and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionslibx11: 1.0.99.1 - 1.7.0
External linkshttp://seclists.org/oss-sec/2021/q2/153
http://unparalleled.eu/blog/2021/20210518-using-xterm-to-navigate-the-huge-color-space/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.