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Operating System: Ubuntu

Ubuntu Security Notice USN-4367-2
Posted May 29, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4367-2 - USN-4367-1 fixed vulnerabilities in the 5.4 Linux kernel. Unfortunately, that update introduced a regression in overlayfs. This update corrects the problem. It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-19377, CVE-2020-11565, CVE-2020-12657
MD5 | a7ff44eff3672e7d5da03bfb9c8127fe
Ubuntu Security Notice USN-4369-2
Posted May 29, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4369-2 - USN-4369-1 fixed vulnerabilities in the 5.3 Linux kernel. Unfortunately, that update introduced a regression in overlayfs. This update corrects the problem. It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-19377, CVE-2019-19769, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-12657
MD5 | fd0df16897a8e91cd82dcaa6c77e3506
Ubuntu Security Notice USN-4359-2
Posted May 29, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4359-2 - USN-4359-1 fixed a vulnerability in APT. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. It was discovered that APT incorrectly handled certain filenames during package installation. If an attacker could provide a specially crafted package to be installed by the system administrator, this could cause APT to crash. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2020-3810
MD5 | 3aae618dec483a779a57ea1ce8065d47
Ubuntu Security Notice USN-4360-4
Posted May 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4360-4 - USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a memory leak that was reverted in USN-4360-2 and USN-4360-3. This update provides the correct fix update for CVE-2020-12762. It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to execute arbitrary code. Various other issues were also addressed.

tags | advisory, arbitrary, memory leak
systems | linux, ubuntu
advisories | CVE-2020-12762
MD5 | 86df77174f085c6a9d0da81563e1e73c
Ubuntu Security Notice USN-4376-1
Posted May 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4376-1 - It was discovered that OpenSSL incorrectly handled ECDSA signatures. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. Matt Caswell discovered that OpenSSL incorrectly handled the random number generator. This may result in applications that use the fork system call sharing the same RNG state between the parent and the child, contrary to expectations. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1551, CVE-2019-1563
MD5 | f989c11ebb96bde96d6e47a9686c7190
Ubuntu Security Notice USN-4375-1
Posted May 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4375-1 - It was discovered that PHP incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service.

tags | advisory, denial of service, php
systems | linux, ubuntu
advisories | CVE-2019-11048
MD5 | ac90635f0db37791117aaebd12e9e72c
Ubuntu Security Notice USN-4374-1
Posted May 27, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4374-1 - Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Unbound incorrectly handled certain queries. A remote attacker could use this issue to perform an amplification attack directed at a target. It was discovered that Unbound incorrectly handled certain malformed answers. A remote attacker could possibly use this issue to cause Unbound to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-12662, CVE-2020-12663
MD5 | 65ac744979d6064e52c3b7c55bb2f20f
Ubuntu Security Notice USN-4373-1
Posted May 26, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4373-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, or execute arbitrary code. It was discovered that Thunderbird did not correctly handle Unicode whitespace characters within the From email header. An attacker could potentially exploit this to spoof the sender email address that Thunderbird displays.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-12387, CVE-2020-12392, CVE-2020-12397, CVE-2020-6831
MD5 | 48d9b8ae7ffedbd250b8387a84151b42
Ubuntu Security Notice USN-4370-2
Posted May 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4370-2 - USN-4370-1 fixed several vulnerabilities in ClamAV. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. It was discovered that ClamAV incorrectly handled parsing ARJ archives. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-3327, CVE-2020-3341
MD5 | 41f2316b173eea1d00d120657fb88797
Ubuntu Security Notice USN-4371-1
Posted May 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4371-1 - It was discovered that libvirt incorrectly handled an active pool without a target path. A remote attacker could possibly use this issue to cause libvirt to crash, resulting in a denial of service. It was discovered that libvirt incorrectly handled memory when retrieving certain domain statistics. A remote attacker could possibly use this issue to cause libvirt to consume resources, resulting in a denial of service. This issue only affected Ubuntu 19.10. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-10703, CVE-2020-12430
MD5 | 277d54e2071edbe532c6f11bdd7e2022
Ubuntu Security Notice USN-4372-1
Posted May 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4372-1 - It was discovered that QEMU incorrectly handled bochs-display devices. A local attacker in a guest could use this to cause a denial of service or possibly execute arbitrary code in the host. This issue only affected Ubuntu 19.10. It was discovered that QEMU incorrectly handled memory during certain VNC operations. A remote attacker could possibly use this issue to cause QEMU to consume resources, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2019-15034, CVE-2019-20382, CVE-2020-10702, CVE-2020-11869, CVE-2020-1983
MD5 | abf7184cc2087c06b76ddc60ed0d60ed
Ubuntu Security Notice USN-4370-1
Posted May 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4370-1 - It was discovered that ClamAV incorrectly handled parsing ARJ archives. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. It was discovered that ClamAV incorrectly handled parsing PDF files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-3327, CVE-2020-3341
MD5 | 39f5e383f91d9ec029fffde8daa2385b
Ubuntu Security Notice USN-4369-1
Posted May 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4369-1 - It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service. Tristan Madani discovered that the file locking implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service or expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-19377, CVE-2019-19769, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-12657
MD5 | 6d0bd201f6f7817bc3279a320a6733e2
Ubuntu Security Notice USN-4365-2
Posted May 20, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4365-2 - USN-4365-1 fixed several vulnerabilities in Bind. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service, or possibly use Bind to perform a reflection attack. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-8616, CVE-2020-8617
MD5 | 5b0e56c1eabe20b3f39807b88f195a78
Ubuntu Security Notice USN-4367-1
Posted May 20, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4367-1 - It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service. It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local attacker with the ability to specify mount options could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-19377, CVE-2020-11565, CVE-2020-12657
MD5 | 6bc265d53b8c9946b979ffba8c1b9846
Ubuntu Security Notice USN-4368-1
Posted May 20, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4368-1 - Tristan Madani discovered that the file locking implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service or expose sensitive information. It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-19769, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-11669, CVE-2020-12657
MD5 | b302dbba64749b9c4db508af02be0333
Ubuntu Security Notice USN-4366-1
Posted May 19, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4366-1 - It was discovered that Exim incorrectly handled certain inputs. An remote attacker could possibly use this issue to access sensitive information or authentication bypass.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2020-12783
MD5 | 9ea6a9371b1e8c0b4e1fe271b5d74364
Ubuntu Security Notice USN-4365-1
Posted May 19, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4365-1 - Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service, or possibly use Bind to perform a reflection attack. Tobias Klein discovered that Bind incorrectly handled checking TSIG validity. A remote attacker could use this issue to cause Bind to crash, resulting in a denial of service, or possibly perform other attacks. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-8616, CVE-2020-8617
MD5 | d997e46eed2a4a36615bb449b70ab0cb
Ubuntu Security Notice USN-4364-1
Posted May 19, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4364-1 - It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service. It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl calls on /dev/vhost-net could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-19060, CVE-2020-10942, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608, CVE-2020-11609, CVE-2020-11668
MD5 | 06e1ea8cf35c10383a5778a3325e0109
Ubuntu Security Notice USN-4363-1
Posted May 18, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4363-1 - It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information. It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local attacker with the ability to specify mount options could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-11494, CVE-2020-11565, CVE-2020-11669, CVE-2020-12657
MD5 | 48a0a77413a79e658053d75f2fdc48ee
Ubuntu Security Notice USN-4362-1
Posted May 18, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4362-1 - It was discovered that DPDK incorrectly handled certain inputs. An attacker could possibly use this issue to cause a crash or execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-10722, CVE-2020-10724, CVE-2020-10725, CVE-2020-10726
MD5 | a2ab0e0f8076bb39ac7ebfb088d4a1a7
Ubuntu Security Notice USN-4361-1
Posted May 18, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4361-1 - Philippe Antoine discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service. Philippe Antoine discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-10957, CVE-2020-10958
MD5 | ee13a535cad8f0e8821745b2f10bb60e
Ubuntu Security Notice USN-4360-3
Posted May 15, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4360-3 - USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a memory leak in some scenarios. This update reverts the security fix pending further investigation. It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to execute arbitrary code. Various other issues were also addressed.

tags | advisory, arbitrary, memory leak
systems | linux, ubuntu
MD5 | 63687d75a84d4a9bd30c0a37bbf17d67
Ubuntu Security Notice USN-4360-2
Posted May 15, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4360-2 - USN-4360-1 fixed a vulnerability in json-c. The security fix introduced a memory leak in some scenarios. This update reverts the security fix pending further investigation. It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to execute arbitrary code. Various other issues were also addressed.

tags | advisory, arbitrary, memory leak
systems | linux, ubuntu
MD5 | a69c0034b9ea3029aeeaa3863c691fb9
Ubuntu Security Notice USN-4360-1
Posted May 14, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4360-1 - It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-12762
MD5 | f15b8050fb65b8c5e463c3e953299e5d
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