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Bug 1623614 - (CVE-2018-6555) CVE-2018-6555 kernel: irda: use-after-free vulnerability in the hashbin list
CVE-2018-6555 kernel: irda: use-after-free vulnerability in the hashbin list
Status: CLOSED NOTABUG
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=none,public=20180904,reported=...
: Security
Depends On:
Blocks: 1623611
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Reported: 2018-08-29 14:09 EDT by Pedro Sampaio
Modified: 2018-09-10 04:02 EDT (History)
50 users (show)

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Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
The irda_setsockopt function in net/irda/af_irda.c in the Linux kernel, through 4.16, allows local users to cause a denial of service (due to a use-after-free of the ias_object and a system crash) or possibly have unspecified other impact by leveraging an AF_IRDA socket.
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Clone Of:
Environment:
Last Closed: 2018-08-30 08:18:10 EDT
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Pedro Sampaio 2018-08-29 14:09:23 EDT 
he irda_setsockopt() function conditionally allocates memory for a new
self->ias_object or, in some cases, reuses the existing
self->ias_object. Existing objects were incorrectly reinserted into the
LM_IAS database which corrupted the doubly linked list used for the
hashbin implementation of the LM_IAS database. When combined with a
memory leak in irda_bind(), this issue could be leveraged to create a
use-after-free vulnerability in the hashbin list.

References:

https://seclists.org/oss-sec/2018/q3/212

Suggested patches:

https://www.spinics.net/lists/stable/msg255033.html

https://www.spinics.net/lists/stable/msg255029.html
Comment 5 Vladis Dronov 2018-08-30 08:18:10 EDT 
Notes:

None of the Red Hat's products are vulnerable to this flaw.
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