Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3613 linux security update 25 September 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Debian Operating System: Debian GNU/Linux 9 Debian GNU/Linux 10 Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-15902 CVE-2019-15118 CVE-2019-15117 CVE-2019-14835 CVE-2019-14821 Reference: ESB-2019.3572.3 ESB-2019.3570 ESB-2019.3536 Original Bulletin: http://www.debian.org/security/2019/dsa-4531 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-4531-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso September 25, 2019 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2019-14821 CVE-2019-14835 CVE-2019-15117 CVE-2019-15118 CVE-2019-15902 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-14821 Matt Delco reported a race condition in KVM's coalesced MMIO facility, which could lead to out-of-bounds access in the kernel. A local attacker permitted to access /dev/kvm could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-14835 Peter Pi of Tencent Blade Team discovered a missing bounds check in vhost_net, the network back-end driver for KVM hosts, leading to a buffer overflow when the host begins live migration of a VM. An attacker in control of a VM could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation on the host. CVE-2019-15117 Hui Peng and Mathias Payer reported a missing bounds check in the usb-audio driver's descriptor parsing code, leading to a buffer over-read. An attacker able to add USB devices could possibly use this to cause a denial of service (crash). CVE-2019-15118 Hui Peng and Mathias Payer reported unbounded recursion in the usb-audio driver's descriptor parsing code, leading to a stack overflow. An attacker able to add USB devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. On the amd64 architecture, and on the arm64 architecture in buster, this is mitigated by a guard page on the kernel stack, so that it is only possible to cause a crash. CVE-2019-15902 Brad Spengler reported that a backporting error reintroduced a spectre-v1 vulnerability in the ptrace subsystem in the ptrace_get_debugreg() function. For the oldstable distribution (stretch), these problems have been fixed in version 4.9.189-3+deb9u1. For the stable distribution (buster), these problems have been fixed in version 4.19.67-2+deb10u1. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAl2K5xlfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0Sj8xAAnBGWzlmy5RyQe8VCE3kkMpwmH/00I5IFpjTbAVvyHzKVYl96YbY1YuAP ID++cBxBElWCQriwCESc5Um/BGpOMmTa3VlkXIVy6uHgwt1Hn+ZW/syFaGt0/brW eKIecVQLyZaV7OOx4Q+J9H5WN1FNKoV3BCsfUFlRqNCUtYQ46X7pN+gyytW4KbZo AEbPkEdUhv2Z6ndq8Z/OJ5cyYms+OonEt08e2qcN0Ig+qRY9l3fgSn/X3tKQiuJj jGKPkd0VYrFzfDKekcboIBZyegahReRe4k+V8I+o/acuQJGR1cV/qCGxboFFI2+s WeSUhaVixP+7HLXyRljFBdvXlAnx/IajEPG+RAVt6zZs1yK+8bVIhai5TarcwbF3 DWQZvpAeLaKgIN4x7s7xDHNJzO9Ea9fhXm/9T1AoaO3wdN2zjOYHLG3YO4TF0PpF rYY9t17uNdAuCxPeQWCciDOiNQVbEmr3+al/78m2VZcBYEI2s1E9fgQJV21rRlv+ fEavwX9OJg6GKcW9v6cyegyf4gfTvjyzIP/rcmn55hiQ9vjVNykkoNUES5Do6sTb /pSSRuUpJtEE+6LnnqbdD0E6l8SC6zgA/+Pu/7BrACxlk9bhYFmVaAwbPPEuRgrz 3d87MB8FEHu4RDGSgomb849wuAXnEVDwM034VtURUSEAXVFQ0dY= =Wqdv - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXYsMxGaOgq3Tt24GAQjM+xAAr0FFKxJRXuz0K6LChy5atTEoFmB5e9dc LD7i2WA9p894kt6saRg6fz1uAgqrhOmCZiozDKDGSt1cv/s8r1cl3ekRHYuAeNRX kQFWM0qCyJ81UNvurW4RUAVTtMTxD+4CC75QirQqRs4dmG6Zx4dfZK2mg73omoqQ aWIi2KMocjrO1mXWaz6V2GXeMlkwYbN0CYeF4m1E6Q9ypg129r5bqQ2hYfuEITb9 mKv+StajgbwznhCirz0iqU7DwEHb/oJtSJWTO80T03kdmugZazWNuG7QUVFPo3u/ FmVM4OEI4P+ZzP4nnDEijgY5yjSrcA4h1XJN2fR5/GxJEm+Fq1/B1i4b7tSGUcjY tN+g8kogva2COJ3+0PUGjAxeWhnipobomjRhJaD+GDXvuS2Z2rVmQtoSAFuyWrJm EF2v+aNRVk1+Mw/TwXYrVq38189/WWBVyLEqFwQAQ5HpyGOcOVdfASISp59XdITJ ALf8TfaBD2odAgPFCoDBDsFAKFcBsLtxC1tfPYKG8y2pgsGUUgsD5mPGFiPK1E86 k7B+sY1Xc2/yT0NfR70f+x5zlwmqtoM0xcQf0LvJWlSCk0M1VW2c5dY4RU+G8vgt hqWO2wLEEY6Fihtz5ecStnf1/iDHSWaWaR6mqLMAfxMXXojpAc3ts2q9+NGWE36W ObWOcYfewqE= =ve1O -----END PGP SIGNATURE-----