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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0766 linux-4.9 security update 3 March 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux-4.9 Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Root Compromise -- Existing Account Access Privileged Data -- Remote/Unauthenticated Modify Arbitrary Files -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-20096 CVE-2019-19965 CVE-2019-19947 CVE-2019-19767 CVE-2019-19537 CVE-2019-19536 CVE-2019-19535 CVE-2019-19534 CVE-2019-19533 CVE-2019-19532 CVE-2019-19531 CVE-2019-19530 CVE-2019-19527 CVE-2019-19525 CVE-2019-19524 CVE-2019-19523 CVE-2019-19447 CVE-2019-19332 CVE-2019-19227 CVE-2019-19068 CVE-2019-19066 CVE-2019-19062 CVE-2019-19057 CVE-2019-19056 CVE-2019-19052 CVE-2019-19051 CVE-2019-19037 CVE-2019-18809 CVE-2019-18683 CVE-2019-18282 CVE-2019-17666 CVE-2019-17133 CVE-2019-17075 CVE-2019-17056 CVE-2019-17055 CVE-2019-17054 CVE-2019-17053 CVE-2019-17052 CVE-2019-16746 CVE-2019-15917 CVE-2019-15505 CVE-2019-15291 CVE-2019-15217 CVE-2019-15098 CVE-2019-14901 CVE-2019-14897 CVE-2019-14896 CVE-2019-14895 CVE-2019-14816 CVE-2019-14815 CVE-2019-14814 CVE-2019-14615 CVE-2019-10220 CVE-2019-2215 CVE-2019-1976 CVE-2019-1953 CVE-2019-1952 CVE-2019-1906 CVE-2019-1905 CVE-2019-1880 CVE-2019-1713 CVE-2019-1705 CVE-2019-1591 CVE-2019-1509 CVE-2019-1489 CVE-2019-0136 CVE-2018-21008 CVE-2018-20976 CVE-2018-13094 CVE-2018-13093 CVE-2018-2100 Reference: ESB-2020.0719 ESB-2020.0572.2 ESB-2020.0305 ESB-2020.0262 ESB-2020.0251 ESB-2019.4539 ESB-2019.4537 ESB-2019.4040 Original Bulletin: https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html - --------------------------BEGIN INCLUDED TEXT-------------------- Package : linux-4.9 Version : 4.9.210-1~deb8u1 CVE ID : CVE-2018-13093 CVE-2018-13094 CVE-2018-20976 CVE-2018-21008 CVE-2019-0136 CVE-2019-2215 CVE-2019-10220 CVE-2019-14615 CVE-2019-14814 CVE-2019-14815 CVE-2019-14816 CVE-2019-14895 CVE-2019-14896 CVE-2019-14897 CVE-2019-14901 CVE-2019-15098 CVE-2019-15217 CVE-2019-15291 CVE-2019-15505 CVE-2019-15917 CVE-2019-16746 CVE-2019-17052 CVE-2019-17053 CVE-2019-17054 CVE-2019-17055 CVE-2019-17056 CVE-2019-17075 CVE-2019-17133 CVE-2019-17666 CVE-2019-18282 CVE-2019-18683 CVE-2019-18809 CVE-2019-19037 CVE-2019-19051 CVE-2019-19052 CVE-2019-19056 CVE-2019-19057 CVE-2019-19062 CVE-2019-19066 CVE-2019-19068 CVE-2019-19227 CVE-2019-19332 CVE-2019-19447 CVE-2019-19523 CVE-2019-19524 CVE-2019-19525 CVE-2019-19527 CVE-2019-19530 CVE-2019-19531 CVE-2019-19532 CVE-2019-19533 CVE-2019-19534 CVE-2019-19535 CVE-2019-19536 CVE-2019-19537 CVE-2019-19767 CVE-2019-19947 CVE-2019-19965 CVE-2019-20096 Debian Bug : 869511 945023 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2018-13093, CVE-2018-13094 Wen Xu from SSLab at Gatech reported several NULL pointer dereference flaws that may be triggered when mounting and operating a crafted XFS volume. An attacker able to mount arbitrary XFS volumes could use this to cause a denial of service (crash). CVE-2018-20976 It was discovered that the XFS file-system implementation did not correctly handle some mount failure conditions, which could lead to a use-after-free. The security impact of this is unclear. CVE-2018-21008 It was discovered that the rsi wifi driver did not correctly handle some failure conditions, which could lead to a use-after- free. The security impact of this is unclear. CVE-2019-0136 It was discovered that the wifi soft-MAC implementation (mac80211) did not properly authenticate Tunneled Direct Link Setup (TDLS) messages. A nearby attacker could use this for denial of service (loss of wifi connectivity). CVE-2019-2215 The syzkaller tool discovered a use-after-free vulnerability in the Android binder driver. A local user on a system with this driver enabled could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. However, this driver is not enabled on Debian packaged kernels. CVE-2019-10220 Various developers and researchers found that if a crafted file- system or malicious file server presented a directory with filenames including a '/' character, this could confuse and possibly defeat security checks in applications that read the directory. The kernel will now return an error when reading such a directory, rather than passing the invalid filenames on to user-space. CVE-2019-14615 It was discovered that Intel 9th and 10th generation GPUs did not clear user-visible state during a context switch, which resulted in information leaks between GPU tasks. This has been mitigated in the i915 driver. The affected chips (gen9 and gen10) are listed at <https://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units#= Gen9>. CVE-2019-14814, CVE-2019-14815, CVE-2019-14816 Multiple bugs were discovered in the mwifiex wifi driver, which could lead to heap buffer overflows. A local user permitted to configure a device handled by this driver could probably use this for privilege escalation. CVE-2019-14895, CVE-2019-14901 ADLab of Venustech discovered potential heap buffer overflows in the mwifiex wifi driver. On systems using this driver, a malicious Wireless Access Point or adhoc/P2P peer could use these to cause a denial of service (memory corruption or crash) or possibly for remote code execution. CVE-2019-14896, CVE-2019-14897 ADLab of Venustech discovered potential heap and stack buffer overflows in the libertas wifi driver. On systems using this driver, a malicious Wireless Access Point or adhoc/P2P peer could use these to cause a denial of service (memory corruption or crash) or possibly for remote code execution. CVE-2019-15098 Hui Peng and Mathias Payer reported that the ath6kl wifi driver did not properly validate USB descriptors, which could lead to a null pointer derefernce. An attacker able to add USB devices could use this to cause a denial of service (BUG/oops). CVE-2019-15217 The syzkaller tool discovered that the zr364xx mdia driver did not correctly handle devices without a product name string, which could lead to a null pointer dereference. An attacker able to add USB devices could use this to cause a denial of service (BUG/oops). CVE-2019-15291 The syzkaller tool discovered that the b2c2-flexcop-usb media driver did not properly validate USB descriptors, which could lead to a null pointer dereference. An attacker able to add USB devices could use this to cause a denial of service (BUG/oops). CVE-2019-15505 The syzkaller tool discovered that the technisat-usb2 media driver did not properly validate incoming IR packets, which could lead to a heap buffer over-read. An attacker able to add USB devices could use this to cause a denial of service (BUG/oops) or to read sensitive information from kernel memory. CVE-2019-15917 The syzkaller tool found a race condition in code supporting UART-attached Bluetooth adapters, which could lead to a use- after-free. A local user with access to a pty device or other suitable tty device could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-16746 It was discovered that the wifi stack did not validate the content of beacon heads provided by user-space for use on a wifi interface in Access Point mode, which could lead to a heap buffer overflow. A local user permitted to configure a wifi interface could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-17052, CVE-2019-17053, CVE-2019-17054, CVE-2019-17055,=20 CVE-2019-17056 Ori Nimron reported that various network protocol implementations - AX.25, IEEE 802.15.4, Appletalk, ISDN, and NFC - allowed all users to create raw sockets. A local user could use this to send arbitrary packets on networks using those protocols. CVE-2019-17075 It was found that the cxgb4 Infiniband driver requested DMA (Direct Memory Access) to a stack-allocated buffer, which is not supported and on some systems can result in memory corruption of the stack. A local user might be able to use this for denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-17133 Nicholas Waisman reported that the wifi stack did not valdiate received SSID information before copying it, which could lead to a buffer overflow if it is not validated by the driver or firmware. A malicious Wireless Access Point might be able to use this to cause a denial of service (memory corruption or crash) or for remote code execution. CVE-2019-17666 Nicholas Waisman reported that the rtlwifi wifi drivers did not properly validate received P2P information, leading to a buffer overflow. A malicious P2P peer could use this to cause a denial of service (memory corruption or crash) or for remote code execution. CVE-2019-18282 Jonathan Berger, Amit Klein, and Benny Pinkas discovered that the generation of UDP/IPv6 flow labels used a weak hash function, "jhash". This could enable tracking individual computers as they communicate with different remote servers and from different networks. The "siphash" function is now used instead. CVE-2019-18683 Multiple race conditions were discovered in the vivid media driver, used for testing Video4Linux2 (V4L2) applications, These race conditions could result in a use-after-free. On a system where this driver is loaded, a user with permission to access media devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-18809 Navid Emamdoost discovered a potential memory leak in the af9005 media driver if the device fails to respond to a command. The security impact of this is unclear. CVE-2019-19037 It was discovered that the ext4 filesystem driver did not correctly handle directories with holes (unallocated regions) in them. An attacker able to mount arbitrary ext4 volumes could use this to cause a denial of service (crash). CVE-2019-19051 Navid Emamdoost discovered a potential memory leak in the i2400m wimax driver if the software rfkill operation fails. The security impact of this is unclear. CVE-2019-19052 Navid Emamdoost discovered a potential memory leak in the gs_usb CAN driver if the open (interface-up) operation fails. The security impact of this is unclear. CVE-2019-19056, CVE-2019-19057 Navid Emamdoost discovered potential memory leaks in the mwifiex wifi driver if the probe operation fails. The security impact of this is unclear. CVE-2019-19062 Navid Emamdoost discovered a potential memory leak in the AF_ALG subsystem if the CRYPTO_MSG_GETALG operation fails. A local user could possibly use this to cause a denial of service (memory exhaustion). CVE-2019-19066 Navid Emamdoost discovered a potential memory leak in the bfa SCSI driver if the get_fc_host_stats operation fails. The security impact of this is unclear. CVE-2019-19068 Navid Emamdoost discovered a potential memory leak in the rtl8xxxu wifi driver, in case it fails to submit an interrupt buffer to the device. The security impact of this is unclear. CVE-2019-19227 Dan Carpenter reported missing error checks in the Appletalk protocol implementation that could lead to a null pointer dereference. The security impact of this is unclear. CVE-2019-19332 The syzkaller tool discovered a missing bounds check in the KVM implementation for x86, which could lead to a heap buffer overflow. A local user permitted to use KVM could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19447 It was discovered that the ext4 filesystem driver did not safely handle unlinking of an inode that, due to filesystem corruption, already has a link count of 0. An attacker able to mount arbitrary ext4 volumes could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19523 The syzkaller tool discovered a use-after-free bug in the adutux USB driver. An attacker able to add and remove USB devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19524 The syzkaller tool discovered a race condition in the ff-memless library used by input drivers. An attacker able to add and remove USB devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19525 The syzkaller tool discovered a use-after-free bug in the atusb driver for IEEE 802.15.4 networking. An attacker able to add and remove USB devices could possibly use this to cause a denial of service (memory corruption or crash) or for privilege escalation. CVE-2019-19527 The syzkaller tool discovered that the hiddev driver did not correctly handle races between a task opening the device and disconnection of the underlying hardware. A local user permitted to access hiddev devices, and able to add and remove USB devices, could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19530 The syzkaller tool discovered a potential use-after-free in the cdc-acm network driver. 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. CVE-2019-19531 The syzkaller tool discovered a use-after-free bug in the yurex USB driver. An attacker able to add and remove USB devices could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19532 The syzkaller tool discovered a potential heap buffer overflow in the hid-gaff input driver, which was also found to exist in many other input drivers. 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. CVE-2019-19533 The syzkaller tool discovered that the ttusb-dec media driver was missing initialisation of a structure, which could leak sensitive information from kernel memory. CVE-2019-19534, CVE-2019-19535, CVE-2019-19536 The syzkaller tool discovered that the peak_usb CAN driver was missing initialisation of some structures, which could leak sensitive information from kernel memory. CVE-2019-19537 The syzkaller tool discovered race conditions in the USB stack, involving character device registration. 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. CVE-2019-19767 The syzkaller tool discovered that crafted ext4 volumes could trigger a buffer overflow in the ext4 filesystem driver. An attacker able to mount such a volume could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19947 It was discovered that the kvaser_usb CAN driver was missing initialisation of some structures, which could leak sensitive information from kernel memory. CVE-2019-19965 Gao Chuan reported a race condition in the libsas library used by SCSI host drivers, which could lead to a null pointer dereference. An attacker able to add and remove SCSI devices could use this to cause a denial of service (BUG/oops). CVE-2019-20096 The Hulk Robot tool discovered a potential memory leak in the DCCP protocol implementation. This may be exploitable by local users, or by remote attackers if the system uses DCCP, to cause a denial of service (out of memory). For Debian 8 "Jessie", these problems have been fixed in version 4.9.210-1~deb8u1. This update additionally fixes Debian bugs #869511 and 945023; and includes many more bug fixes from stable updates 4.9.190-4.9.210 inclusive. We recommend that you upgrade your linux-4.9 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 - --------------------------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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXl2uhGaOgq3Tt24GAQhDxw//acT47Lx+x+7QdPOSw0BYOe8jH575LQeH HBjLty8E6zY/OGs5KP2xP3ASbBV6Z+QRnyrXX31kSeI7PayLZdCi2GxaKEGjl0/N Fyq2/W5xXjfZ3KJybkZMi1nR/thApQ3kAMzh8I3Ti0xT8mMIU+/nPTvIMXphqGOz 6UaxZnHnhErwSEmDf+OoSbG4MblqM7U45cN25/EvGKTA7cNYWUrsq0Ny79eJY7Hg 0VIhqGdWFFH3xoQC3mtTQdDGJKvR7S6rC2y183ov9cEyVvdegwKUTxjQpuJJ8bfG Zt327NfLewXniAVkGC1kFYBGvYhPvjJ7AW1A77hHlw54HivmxzTxsu20/DHgUSmc rBombPLryadf1tFv9e0NDlntyks0B6keqR3ICNPosHk8st9lAsPyIO3GhsB6ZXI8 WeBMkiv9gFi+P7Th/QJkOOYe36PN4gibp0NXULq2UOKalYQy3oN521j0aFtOrOCx 9eAMvNROZeEUJtVVNxq639YzJdEyjast65H3o8FPsM0ClZ/tCNjoNvMXo2FDp+sH BtzK5Qbo8FTJeJBmd6Vre1DK8HFwe1P+pu6H8GdLNVguedhHGBwXosHmxG94J8Fq Xzo0Xqh9QVAwvRy0Nr7qj3JM/735Xshxi/TfE+drYX94VM1B3POPzDx4/wSX6r3l QWm0zRKX83E= =iwLw -----END PGP SIGNATURE-----