Bug 1444501 (CVE-2017-7979) - CVE-2017-7979 kernel: cookie feature in packet action API implementation mishandles tb nlattr array
Summary: CVE-2017-7979 kernel: cookie feature in packet action API implementation mish...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-7979
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-04-21 13:12 UTC by Adam Mariš
Modified: 2019-09-29 14:11 UTC (History)
32 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-04-21 13:16:25 UTC


Attachments (Terms of Use)

Description Adam Mariš 2017-04-21 13:12:06 UTC
The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.


Note You need to log in before you can comment on or make changes to this bug.