| Vulnerability Name: | CVE-2022-21682 (CCN-217321) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assigned: | 2021-11-16 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Published: | 2022-01-12 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: | 2022-02-10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary: | Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| CVSS v3 Severity: | 6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N) 5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
6.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
6.7 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N)
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| Vulnerability Type: | CWE-22 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Vulnerability Consequences: | Obtain Information | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2022-21682 Source: XF Type: UNKNOWN flatpak-cve202221682-dir-traversal(217321) Source: MISC Type: Patch, Third Party Advisory https://github.com/flatpak/flatpak/commit/445bddeee657fdc8d2a0a1f0de12975400d4fc1a Source: MISC Type: Patch, Third Party Advisory https://github.com/flatpak/flatpak/commit/4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa Source: CCN Type: Flatpak GIT Repository CVE-2022-21682: flatpak-builder --mirror-screenshots-url can access files outside the build directory Source: CONFIRM Type: Patch, Third Party Advisory https://github.com/flatpak/flatpak/security/advisories/GHSA-8ch7-5j3h-g4fx Source: FEDORA Type: Mailing List, Third Party Advisory FEDORA-2022-825ca6bf2b Source: FEDORA Type: Mailing List, Third Party Advisory FEDORA-2022-7e328bd66c Source: DEBIAN Type: Third Party Advisory DSA-5049 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Configuration 2: Configuration 3: Configuration 4: Configuration RedHat 1: Configuration RedHat 2:  Denotes that component is vulnerable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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