CVE-2017-1000083
Description
It was found that evince did not properly sanitize the command line which is run to untar Comic Book Tar (CBT) files, thereby allowing command injection. A specially crafted CBT file, when opened by evince or evince-thumbnailer, could execute arbitrary commands in the context of the evince program.
Mitigation
- Disabling evince-thumbnailer to render icons will reduce the attack surface (removing /usr/share/thumbnailers/evince.thumbnailer).
- SELinux in enforcing mode partially restricts evince-thumbnailer
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.1 | 7.8 | N/A |
| Attack Vector | Network | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Changed | Unchanged | N/A |
| Confidentiality | Low | High | N/A |
| Integrity Impact | Low | High | N/A |
| Availability Impact | Low | High | N/A |
Vector
Red Hat: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
NVD: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Acknowledgements
Red Hat would like to thank Felix Wilhelm (Google Security Team) for reporting this issue.
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