Absent URI scheme validation in KDE Discover



Published: 2021-03-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-28117
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		discover
Client/Desktop applications / Other client software

Vendor KDE.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU51424

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28117

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to missing URI scheme validation. A remote attacker can pass specially crafted link to an SMB or NFS share and potentially bypass implemented security restrictions by tricking the Discover to follow such links.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

discover: 5.15.0 - 5.21.2

External links

http://kde.org/info/security/advisory-20210310-1.txt


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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