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Bug 1637504 - (CVE-2018-17977) CVE-2018-17977 kernel: Mishandled interactions among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets resulting in a denial of service
CVE-2018-17977 kernel: Mishandled interactions among XFRM Netlink messages, I...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20181005,repor...
: Security
Depends On: 1637505
Blocks: 1637555
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Reported: 2018-10-09 07:26 EDT by Andrej Nemec
Modified: 2018-10-24 14:04 EDT (History)
52 users (show)

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A flaw was found in the Linux kernel's handling of complex interactions between netlink, IP, and AH style packets which can enter a state where the used memory will not be freed. This can eventually use all memory and possibly crash userspace programs due to lack of available memory.
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Description Andrej Nemec 2018-10-09 07:26:50 EDT 
It was found that the Linux kernel mishandles certain interaction among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets, which allows local users to cause a denial of service (memory consumption and system hang).

References:

https://seclists.org/oss-sec/2018/q4/15
Comment 1 Andrej Nemec 2018-10-09 07:28:27 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1637505]
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