Bug 1749716 (CVE-2019-15890)

Summary:	CVE-2019-15890 QEMU: Slirp: use-after-free during packet reassembly
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ailan, ajia, amit, areis, berrange, bmontgom, cfergeau, dbecker, drjones, dwmw2, eparis, imammedo, itamar, jburrell, jen, jferlan, jforbes, jjoyce, jmaloy, jnovy, jokerman, jschluet, kbasil, knoel, lhh, lpeer, lsm5, m.a.young, mburns, mkenneth, mrezanin, mst, nstielau, pbonzini, rbalakri, ribarry, rjones, robinlee.sysu, sclewis, slinaber, sponnaga, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free issue was found in the SLiRP networking implementation of the QEMU emulator. The issue occurs in ip_reass() routine while reassembling incoming packets, if the first fragment is bigger than the m->m_dat[] buffer. A user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-10 16:31:43 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:	1749723, 1749724, 1749730, 1749731, 1749735, 1749736, 1749737, 1750183, 1750184, 1750185, 1755596, 1755597, 1793216, 1825808, 1835022
Bug Blocks:	1727851

Description Prasad Pandit 2019-09-06 10:06:55 UTC

A use-after-free issue was found in the SLiRP networking implementation
of the QEMU emulator. It occurs in ip_reass() routine while reassembling
incoming packets, if the first fragment is bigger than the m->m_dat[] buffer. 

A user/process could use this flaw to crash the Qemu process on the host
resulting in DoS.

Upstream patch:
---------------
  -> https://gitlab.freedesktop.org/slirp/libslirp/commit/c59279437eda91841b9d26079c70b8a540d41204

Comment 2 Prasad Pandit 2019-09-06 10:27:27 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1749730]

Comment 5 Joshua Padman 2019-09-08 23:32:06 UTC

Statement:

Red Hat OpenStack Platform:                                                                                                                 
* This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack Platform. Although updating is recommended for affected versions (see below), Red Hat OpenStack Platform environments are not vulnerable.

Comment 10 errata-xmlrpc 2020-03-10 11:33:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2020:0775 https://access.redhat.com/errata/RHSA-2020:0775

Comment 11 Product Security DevOps Team 2020-03-10 16:31:43 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-15890

Comment 12 errata-xmlrpc 2020-03-17 17:56:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extras

Via RHSA-2020:0889 https://access.redhat.com/errata/RHSA-2020:0889

Comment 17 errata-xmlrpc 2020-11-04 02:52:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4676 https://access.redhat.com/errata/RHSA-2020:4676