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Operating System: Ubuntu

Ubuntu Security Notice USN-4752-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4752-1 - Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. Jay Shin discovered that the ext4 file system implementation in the Linux kernel did not properly handle directory access with broken indexing, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2020-10135, CVE-2020-14314, CVE-2020-15436, CVE-2020-15437, CVE-2020-24490, CVE-2020-25212, CVE-2020-25284, CVE-2020-25641, CVE-2020-25643, CVE-2020-25704, CVE-2020-27152, CVE-2020-27815, CVE-2020-28588, CVE-2020-28915, CVE-2020-29368, CVE-2020-29369, CVE-2020-29371, CVE-2020-29660, CVE-2020-29661, CVE-2020-35508
MD5 | 9add7841f0ccf8f64e1da83e75e06c64
Ubuntu Security Notice USN-4751-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4751-1 - It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local attacker could use this to expose sensitive information. Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling fonts. A local attacker could possibly use this to expose sensitive information. Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25656, CVE-2020-25668, CVE-2020-25669, CVE-2020-25704, CVE-2020-27673, CVE-2020-27675, CVE-2020-27777, CVE-2020-27815, CVE-2020-27830, CVE-2020-27835, CVE-2020-28588, CVE-2020-28974, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2020-35508
MD5 | 7bb32fb3e62f03bec71b2c606776cd36
Ubuntu Security Notice USN-4753-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4753-1 - It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2020-28374
MD5 | 3137bd80ba971c0edbe8ff58fc754a23
Ubuntu Security Notice USN-4750-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4750-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-28588, CVE-2020-28941, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2021-20177
MD5 | c85137173facaaae05662060f5c26ad1
Ubuntu Security Notice USN-4749-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4749-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661
MD5 | e814a088294feb0a838a75b2880951cd
Ubuntu Security Notice USN-4748-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4748-1 - It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29660, CVE-2020-29661
MD5 | 89dfc2cac6b4f51b038cdb39707b3c65
Ubuntu Security Notice USN-4747-2
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4747-2 - USN-4747-1 fixed a vulnerability in screen. This update provides the corresponding update for Ubuntu 14.04 ESM. Felix Weinmann discovered that GNU Screen incorrectly handled certain character sequences. A remote attacker could use this issue to cause GNU Screen to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-26937
MD5 | 51106d68ba3d0aa06c100023b37ce617
Ubuntu Security Notice USN-4698-2
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4698-2 - USN-4698-1 fixed vulnerabilities in Dnsmasq. The updates introduced regressions in certain environments related to issues with multiple queries, and issues with retries. This update fixes the problem. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled memory when sorting RRsets. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled extracting certain names. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented address/port checks. A remote attacker could use this issue to perform a cache poisoning attack. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented query resource name checks. A remote attacker could use this issue to perform a cache poisoning attack. Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled multiple query requests for the same resource name. A remote attacker could use this issue to perform a cache poisoning attack. It was discovered that Dnsmasq incorrectly handled memory during DHCP response creation. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-14834, CVE-2020-25684, CVE-2020-25685, CVE-2020-25686
MD5 | d9480652e5dc691b11f3f1725a0b37f0
Ubuntu Security Notice USN-4746-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4746-1 - Tavis Ormandy discovered that xterm incorrectly handled certain character sequences. A remote attacker could use this issue to cause xterm to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-27135
MD5 | 019fb5c1e160e7e47bdc8cabc31aac80
Ubuntu Security Notice USN-4747-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4747-1 - Felix Weinmann discovered that GNU Screen incorrectly handled certain character sequences. A remote attacker could use this issue to cause GNU Screen to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-26937
MD5 | c88959542941690d285357a3da9b35eb
Ubuntu Security Notice USN-4745-1
Posted Feb 24, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4745-1 - David Benjamin discovered that OpenSSL incorrectly handled comparing certificates containing a EDIPartyName name type. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. Tavis Ormandy discovered that OpenSSL incorrectly handled parsing issuer fields. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-1971, CVE-2021-23841
MD5 | 1a7f63d15153eb9e27d7797b79124c6a
Apache Flink JAR Upload Java Code Execution
Posted Feb 23, 2021
Authored by Brendan Coles, bigger.wing, Henry Chen | Site metasploit.com

This Metasploit module uses job functionality in the Apache Flink dashboard web interface to upload and execute a JAR file, leading to remote execution of arbitrary Java code as the web server user. This module has been tested successfully on Apache Flink versions: 1.9.3 on Ubuntu 18.04.4; 1.11.2 on Ubuntu 18.04.4; 1.9.3 on Windows 10; and 1.11.2 on Windows 10.

tags | exploit, java, remote, web, arbitrary
systems | linux, windows, ubuntu
MD5 | df5b84ceecc3ad0a0dd97aadca7fdd1a
Ubuntu Security Notice USN-4467-3
Posted Feb 23, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4467-3 - USN-4467-1 fixed vulnerabilities in QEMU. The fix for CVE-2020-13754 introduced a regression in certain environments. This update fixes the problem. Ren Ding, Hanqing Zhao, Alexander Bulekov, and Anatoly Trosinenko discovered that the QEMU incorrectly handled certain msi-x mmio operations. An attacker inside a guest could possibly use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-13754
MD5 | a7e31c1e96f7d9b05feefaa9025c72ab
Ubuntu Security Notice USN-4744-1
Posted Feb 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4744-1 - Pasi Saarinen discovered that OpenLDAP incorrectly handled certain short timestamps. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-27212
MD5 | 4c2ceedf78dd16293395750597aaf133
Ubuntu Security Notice USN-4743-1
Posted Feb 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4743-1 - It was discovered that the GDK-PixBuf library did not properly handle certain GIF images. If an user or automated system were tricked into opening a specially crafted GIF file, a remote attacker could use this flaw to cause GDK-PixBuf to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-20240
MD5 | 6f52348108b149927c94f10db41bea74
Ubuntu Security Notice USN-4742-1
Posted Feb 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4742-1 - It was discovered that Django incorrectly accepted semicolons as query parameters. A remote attacker could possibly use this issue to perform a Web Cache Poisoning attack.

tags | advisory, remote, web
systems | linux, ubuntu
advisories | CVE-2021-23336
MD5 | 279bc118d71b269f7d49c712f6ea35c4
Ubuntu Security Notice USN-4740-1
Posted Feb 19, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4740-1 - It was discovered that Apache Shiro mishandled specially crafted requests. An attacker could use this vulnerability to bypass authentication mechanisms.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2020-11989
MD5 | d99b67e87de86e39e67a7473af9d2565
Ubuntu Security Notice USN-4741-1
Posted Feb 19, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4741-1 - It was discovered that Jackson Databind incorrectly handled deserialization. An attacker could possibly use this issue to execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2017-15095
MD5 | e3e7583b332766aed829a8c80c341bff
Ubuntu Security Notice USN-4739-1
Posted Feb 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4739-1 - A large number of security issues were discovered in the WebKitGTK Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

tags | advisory, remote, web, denial of service, arbitrary, javascript, code execution, xss
systems | linux, ubuntu
advisories | CVE-2020-13558
MD5 | a5feb8fa066d0c3a1865f6e0f2147384
Ubuntu Security Notice USN-4738-1
Posted Feb 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4738-1 - Paul Kehrer discovered that OpenSSL incorrectly handled certain input lengths in EVP functions. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. Tavis Ormandy discovered that OpenSSL incorrectly handled parsing issuer fields. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-23840, CVE-2021-23841
MD5 | ddd35a00ee36d9b3807f0f94e460031e
Ubuntu Security Notice USN-4737-1
Posted Feb 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4737-1 - It was discovered that Bind incorrectly handled GSSAPI security policy negotiation. A remote attacker could use this issue to cause Bind to crash, resulting in a denial of service, or possibly execute arbitrary code. In the default installation, attackers would be isolated by the Bind AppArmor profile.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-8625
MD5 | 495d4f5b0aec882a3b44b696b0874475
Ubuntu Security Notice USN-4734-2
Posted Feb 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4734-2 - USN-4734-1 fixed several vulnerabilities in wpa_supplicant. This update provides the corresponding update for Ubuntu 14.04 ESM. It was discovered that wpa_supplicant did not properly handle P2P group information in some situations, leading to a heap overflow. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that hostapd did not properly handle UPnP subscribe messages in some circumstances. An attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-12695, CVE-2021-0326
MD5 | f9aca742cf078ddc6d67314d0dee884c
Ubuntu Security Notice USN-4736-1
Posted Feb 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4736-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. It was discovered that responses received during the plaintext phase of the STARTTLS connection setup were subsequently evaluated during the encrypted session. A person in the middle could potentially exploit this to perform a response injection attack. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-15685, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960
MD5 | f6196100b7e6c3859b8474631f16bf7e
Ubuntu Security Notice USN-4735-1
Posted Feb 15, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4735-1 - Heikki Linnakangas discovered that PostgreSQL incorrectly leaked values of denied columns when handling certain errors. A remote attacker could possibly use this issue to obtain sensitive information.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2021-3393
MD5 | 227bd67b06137ca52a640ada1774b34d
Ubuntu Security Notice USN-4734-1
Posted Feb 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4734-1 - It was discovered that wpa_supplicant did not properly handle P2P group information in some situations, leading to a heap overflow. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that hostapd did not properly handle UPnP subscribe messages in some circumstances. An attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-12695, CVE-2021-0326
MD5 | be6482b8e15c1151887efd102bd3eefa
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