-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-4531-1 security@xxxxxxxxxx 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@xxxxxxxxxxxxxxxx -----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-----
