Bug 1296253 (CVE-2016-0723)
Summary: | CVE-2016-0723 kernel: Kernel memory disclosure and crash in tty layer | ||||||
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Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> | ||||
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> | ||||
Status: | CLOSED WONTFIX | QA Contact: | |||||
Severity: | medium | Docs Contact: | |||||
Priority: | medium | ||||||
Version: | unspecified | CC: | aquini, arm-mgr, bhu, blc, carnil, dhoward, dominik.mierzejewski, fhrbata, iboverma, jkacur, joelsmith, jross, kernel-mgr, kstutsma, lgoncalv, matt, mcressma, mlangsdo, nmurray, osoukup, plougher, rt-maint, rvrbovsk, sardella, security-response-team, slawomir, slong, williams, wmealing | ||||
Target Milestone: | --- | Keywords: | Security | ||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: |
A use-after-free flaw was discovered in the Linux kernel's tty subsystem, which allows for the disclosure of uncontrolled memory location and possible kernel panic. The information leak is caused by a race condition when attempting to set and read the tty line discipline. A local attacker could use the TIOCSETD (via tty_set_ldisc) to switch to a new line discipline; a concurrent call to a TIOCGETD ioctl performing a read on a given tty could then access previously allocated memory. Up to 4 bytes could be leaked when querying the line discipline or the kernel could panic with a NULL-pointer dereference.
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Story Points: | --- | ||||
Clone Of: | Environment: | ||||||
Last Closed: | 2019-06-08 02:47:13 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: | 1300224 | ||||||
Bug Blocks: | 1296261 | ||||||
Attachments: |
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Description
Adam Mariš
2016-01-06 17:51:46 UTC
Created attachment 1112221 [details]
Proposed patch
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1300224] This issue went public via this correspondence: http://lkml.iu.edu/hypermail/linux/kernel/1511.3/03045.html kernel-4.3.4-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report. kernel-4.3.4-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report. Statement: This issue affects kernels in Red Hat Enterprise Linux 5, 6 and 7. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. |