Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 2 |
CVE-ID | CVE-2021-21381 |
CWE-ID | CWE-401 CWE-74 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Flatpak Server applications / Frameworks for developing and running applications |
Vendor | Flatpak |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
Updated: 14.03.2021
Added vulnerability #2.
EUVDB-ID: #VU51413
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak. A remote attacker can force the application to leak memory and perform denial of service attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsFlatpak: 1.10.0 - 1.10.1
External linkshttp://github.com/flatpak/flatpak/releases/tag/1.10.2
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.
EUVDB-ID: #VU51443
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-21381
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper input validation within the "file forwarding" feature. By putting the special tokens `@@` and/or `@@u` in the Exec field of a Flatpak app's .desktop file, a malicious app publisher can trick flatpak into behaving as though the user had chosen to open a target file with their Flatpak app, which automatically makes that file available to the Flatpak app.
MitigationInstall updates from vendor's website.
Vulnerable software versionsFlatpak: 0.9.4 - 1.10.1
External linkshttp://github.com/flatpak/flatpak/commit/8279c5818425b6812523e3805bbe242fb6a5d961
http://github.com/flatpak/flatpak/commit/a7401e638bf0c03102039e216ab1081922f140ae
http://github.com/flatpak/flatpak/commit/eb7946bb6248923d8c90fe9b84425fef97ae580d
http://github.com/flatpak/flatpak/pull/4156
http://github.com/flatpak/flatpak/releases/tag/1.10.2
http://github.com/flatpak/flatpak/security/advisories/GHSA-xgh4-387p-hqpp
http://www.debian.org/security/2021/dsa-4868
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.