ESB-2019.0251 - [Debian] qemu: Denial of service - Remote/unauthenticated 2019-01-30

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0251
                     [DLA 1646-1] qemu security update
                              30 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           qemu
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-19489 CVE-2018-19364 CVE-2018-17958

Reference:         ESB-2018.3670
                   ESB-2018.3660

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html

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Package        : qemu
Version        : 1:2.1+dfsg-12+deb8u9
CVE ID         : CVE-2018-17958 CVE-2018-19364 CVE-2018-19489

Several vulnerabilities were found in QEMU, a fast processor emulator:

CVE-2018-17958

    The rtl8139 emulator is affected by an integer overflow and subsequent
    buffer overflow. This vulnerability might be triggered by remote
    attackers with crafted packets to perform denial of service (via OOB
    stack buffer access).

CVE-2018-19364

    The 9pfs subsystem is affected by a race condition allowing threads to
    modify an fid path while it is being accessed by another thread,
    leading to (for example) a use-after-free outcome. This vulnerability
    might be triggered by local attackers to perform denial of service.

CVE-2018-19489

    The 9pfs subsystem is affected by a race condition during file
    renaming. This vulnerability might be triggered by local attackers to
    perform denial of service.

For Debian 8 "Jessie", these problems have been fixed in version
1:2.1+dfsg-12+deb8u9.

We recommend that you upgrade your qemu packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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