Bug 1962836 (CVE-2021-3567)
| Summary: | CVE-2021-3567 caribou: segfault on pressing ē since Xorg CVE-2020-25712 fix | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | dueno, jcpunk, leigh123linux, pnemade |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | caribou 0.4.21 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in Caribou due to a regression of CVE-2020-25712 fix. An attacker could use this flaw to bypass screen-locking applications that leverage Caribou as an input mechanism. The highest threat from this vulnerability is to system availability.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-05-26 17:32:13 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1962837, 1962838 | ||
| Bug Blocks: | 1962839, 1965598 | ||
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Description
Guilherme de Almeida Suckevicz
2021-05-20 16:36:53 UTC
Created caribou tracking bugs for this issue: Affects: epel-7 [bug 1962838] Affects: fedora-all [bug 1962837] Upstream merge request: https://gitlab.gnome.org/GNOME/caribou/-/merge_requests/3 Upstream fix: https://gitlab.gnome.org/GNOME/caribou/-/commit/d41c8e44b12222a290eaca16703406b113a630c6 Not strictly required from a security perspective, these are related issues/commits that have been ported upstream from Linux Mint: https://gitlab.gnome.org/GNOME/caribou/-/issues/7 https://gitlab.gnome.org/GNOME/caribou/-/commit/76fbd11575f918fc898cb0f5defe07f67c11ec38 https://gitlab.gnome.org/GNOME/caribou/-/merge_requests/5 https://gitlab.gnome.org/GNOME/caribou/-/commit/ba8219ccc67d1d0964fb9ff25125c3be5fb80681 In reply to comment #0: > It was discovered that the Caribou onscreen keyboard could be made to crash > when given certain input values. An attacker could use this to bypass > screen-locking applications that support using Caribou as an input mechanism. Specifically, this was first reported in the on-screen keyboard which runs within the Cinnamon process and uses libcaribou. Pressing ē led to a Cinnamon crash and possible screensaver lock bypass. Cinnamon issue: https://github.com/linuxmint/cinnamon-screensaver/issues/354 It is worth noting that caribou is only shipped with Red Hat Enterprise Linux 7 (caribou-0.4.21) while cinnamon-screensaver is not shipped in Red Hat products. |