ID

VAR-201906-1175

CVE

CVE-2019-11477

TITLE

Ubuntu Security Notice USN-4017-1

DESCRIPTION

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-4465-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso June 17, 2019 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2019-3846 CVE-2019-5489 CVE-2019-9500 CVE-2019-9503 CVE-2019-10126 CVE-2019-11477 CVE-2019-11478 CVE-2019-11479 CVE-2019-11486 CVE-2019-11599 CVE-2019-11815 CVE-2019-11833 CVE-2019-11884 Debian Bug : 928989 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-3846, CVE-2019-10126 huangwen reported multiple buffer overflows in the Marvell wifi (mwifiex) driver, which a local user could use to cause denial of service or the execution of arbitrary code. CVE-2019-5489 Daniel Gruss, Erik Kraft, Trishita Tiwari, Michael Schwarz, Ari Trachtenberg, Jason Hennessey, Alex Ionescu, and Anders Fogh discovered that local users could use the mincore() system call to obtain sensitive information from other processes that access the same memory-mapped file. CVE-2019-11479 Jonathan Looney reported that an attacker could force the Linux kernel to segment its responses into multiple TCP segments, each of which contains only 8 bytes of data, drastically increasing the bandwidth required to deliver the same amount of data. This update introduces a new sysctl value to control the minimal MSS (net.ipv4.tcp_min_snd_mss), which by default uses the formerly hard- coded value of 48. We recommend raising this to 536 unless you know that your network requires a lower value. CVE-2019-11486 Jann Horn of Google reported numerous race conditions in the Siemens R3964 line discipline. This module has therefore been disabled. CVE-2019-11599 Jann Horn of Google reported a race condition in the core dump implementation which could lead to a use-after-free. CVE-2019-11815 It was discovered that a use-after-free in the Reliable Datagram Sockets protocol could result in denial of service and potentially privilege escalation. This protocol module (rds) is not auto- loaded on Debian systems, so this issue only affects systems where it is explicitly loaded. CVE-2019-11833 It was discovered that the ext4 filesystem implementation writes uninitialised data from kernel memory to new extent blocks. A local user able to write to an ext4 filesystem and then read the filesystem image, for example using a removable drive, might be able to use this to obtain sensitive information. CVE-2019-11884 It was discovered that the Bluetooth HIDP implementation did not ensure that new connection names were null-terminated. A local user with CAP_NET_ADMIN capability might be able to use this to obtain sensitive information from the kernel stack. 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAl0H04lfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0Tszw//R1zmUfrItTVMKsH3SlhMG/Nyd1efD/MaYwK/MXHv02BH56G3Th/W1uxh MEjyYTs7gE/UNyx6mr90G/BvymKNCqMEk5ooT7+xXcIgfBi+qvQW/YoBSOFi+Gai 58ofw0En+OQ4Fs1J95XRFjgegBitnsBumMxDcn2adKsbr7s8mKDaesENuXGe7sam Da8T6b0akCWK1i85JsQMG3OI661EdjosDHFHJyCVo8L1q3guYG11GPVlT/TI1ErN 68dVqLWq01Vn5TjKaUr6xeAHDMma+fKaHaitnxhmt06AcH/zQo4wDocQx8DOEWpE 6xBcCyABkKQ84iTKrFZKcnBDCwHaEcq6UytqIbkXIGpA0jRgaLzCNEOWt9GuENmt YoaxXwIi9RSMe8flyrWURGyWLrfJkh/Bk/P6WlpOCMSJmB9uXTnPxjMpfoMNqQjs BljbGqeN06dvFAq1fMzlqykbeHzDksHZ4pZizMNYqCNdQs3erm0rdyS55mN60o5/ SDIur1KokXi60zTwDPne1tyh00EP0liWyvh79u2/kaIazjbtTtoVYlyF5Wm/pu/r E46Mpv8pI7YIDNUVrtM/vLznqq+4BcVaqLBIVeMf+XAfqxJ5IrZ4ejaPvlP7hi4+ NwCQrSCaGk2nwBZr6Xs0qYVTsLLY9jkg8FUWPdH4ZEOFcGaWi3A=dgfy -----END PGP SIGNATURE----- . ========================================================================= Ubuntu Security Notice USN-4017-2 June 17, 2019 linux, linux-aws, linux-azure, linux-lts-trusty, linux-lts-xenial vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: The system could be made to crash if it received specially crafted network traffic. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM Details: USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu. This update provides the corresponding updates for the Linux kernel for Ubuntu 16.04 ESM and Ubuntu 14.04 ESM. (CVE-2019-11477) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: linux-image-3.13.0-171-generic 3.13.0-171.222 linux-image-3.13.0-171-generic-lpae 3.13.0-171.222 linux-image-3.13.0-171-lowlatency 3.13.0-171.222 linux-image-4.15.0-1047-azure 4.15.0-1047.51~14.04.1 linux-image-4.4.0-1046-aws 4.4.0-1046.50 linux-image-4.4.0-151-generic 4.4.0-151.178~14.04.1 linux-image-4.4.0-151-generic-lpae 4.4.0-151.178~14.04.1 linux-image-4.4.0-151-lowlatency 4.4.0-151.178~14.04.1 linux-image-aws 4.4.0.1046.47 linux-image-azure 4.15.0.1047.34 linux-image-generic 3.13.0.171.182 linux-image-generic-lpae 3.13.0.171.182 linux-image-generic-lpae-lts-xenial 4.4.0.151.133 linux-image-generic-lts-xenial 4.4.0.151.133 linux-image-lowlatency-lts-xenial 4.4.0.151.133 Ubuntu 12.04 ESM: linux-image-3.13.0-171-generic 3.13.0-171.222~12.04.1 linux-image-3.13.0-171-generic-lpae 3.13.0-171.222~12.04.1 linux-image-3.13.0-171-lowlatency 3.13.0-171.222~12.04.1 linux-image-3.2.0-141-generic 3.2.0-141.188 linux-image-generic 3.2.0.141.156 linux-image-generic-lpae-lts-trusty 3.13.0.171.159 linux-image-generic-lts-trusty 3.13.0.171.159 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://usn.ubuntu.com/4017-2 https://usn.ubuntu.com/4017-1 CVE-2019-11477, CVE-2019-11478, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

overflow

EXPLOIT AVAILABILITY

EXTERNAL IDS

REFERENCES

CREDITS

Ubuntu

SOURCES

LAST UPDATE DATE

2026-03-26T21:06:03.130000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE