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Files from Ubuntu

Email addresssecurity at ubuntu.com
First Active2004-10-28
Last Active2021-04-16
Ubuntu Security Notice USN-4894-1
Posted Mar 30, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4894-1 - 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-2020-27918, CVE-2021-1799
MD5 | 4e22d60fd6aa436f1afcb95822fbbce6
Ubuntu Security Notice USN-4893-1
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4893-1 - Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spook a website and trick the user into providing credentials. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, windows, ubuntu
advisories | CVE-2021-23981, CVE-2021-23983, CVE-2021-23984, CVE-2021-23985, CVE-2021-23986, CVE-2021-23987
MD5 | 361f6d2ac9ae9e3ba90818da079bb556
Ubuntu Security Notice USN-4888-2
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4888-2 - USN-4888-1 fixed several vulnerabilities in ldb. This update provides the corresponding update for Ubuntu 14.04 ESM. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain LDAP attributes. A remote attacker could possibly use this issue to cause the LDAP server to crash, resulting in a denial of service. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain DN strings. A remote attacker could use this issue to cause the LDAP server 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, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-27840, CVE-2021-20277
MD5 | a7edc38f2801676f33f9cbf0c9e31080
Ubuntu Security Notice USN-3685-2
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3685-2 - USN-3685-1 fixed a vulnerability in Ruby. The fix for CVE-2017-0903 introduced a regression in Ruby. This update fixes the problem.

tags | advisory, ruby
systems | linux, ubuntu
advisories | CVE-2017-0898, CVE-2017-0901, CVE-2017-0902, CVE-2017-0903, CVE-2017-10784, CVE-2017-14064, CVE-2017-17742, CVE-2018-1000074, CVE-2018-8777
MD5 | f156e986c66dcd65f01f2e7c3812a8fe
Ubuntu Security Notice USN-4891-1
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4891-1 - It was discovered that OpenSSL incorrectly handled certain renegotiation ClientHello messages. A remote attacker could use this issue to cause OpenSSL 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-2021-3449
MD5 | 65dc6a577fcb68c0413c66300d99e501
Ubuntu Security Notice USN-4890-1
Posted Mar 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4890-1 - Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information. Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27170, CVE-2020-27171
MD5 | 99fda04e62a9dedd76b21402a376b8ad
Ubuntu Security Notice USN-4889-1
Posted Mar 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4889-1 - Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
MD5 | 96a483ce597a7b17996c0efe3f5a9d19
Ubuntu Security Notice USN-4888-1
Posted Mar 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4888-1 - Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain LDAP attributes. A remote attacker could possibly use this issue to cause the LDAP server to crash, resulting in a denial of service. Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain DN strings. A remote attacker could use this issue to cause the LDAP server 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-2020-27840, CVE-2021-20277
MD5 | 68476cbff2be3b86caf597a6c57630f2
Ubuntu Security Notice USN-4887-1
Posted Mar 24, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4887-1 - De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker could use this to expose sensitive information or possibly execute arbitrary code. Adam Nichols discovered that heap overflows existed in the iSCSI subsystem 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, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27170, CVE-2020-27171, CVE-2021-27363, CVE-2021-27364, CVE-2021-27365, CVE-2021-3444
MD5 | ec10d1a53d4fcdd31e305a6e8e3837d5
Ubuntu Security Notice USN-4886-1
Posted Mar 23, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4886-1 - It was discovered that Privoxy incorrectly handled CGI requests. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. It was discovered that Privoxy incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, cgi
systems | linux, ubuntu
advisories | CVE-2020-35502, CVE-2021-20211, CVE-2021-20212, CVE-2021-20213, CVE-2021-20214, CVE-2021-20215, CVE-2021-20216, CVE-2021-20272, CVE-2021-20273, CVE-2021-20275
MD5 | 8a08b9bbf58d739ee350ef39d3a2cc6b
Ubuntu Security Notice USN-4885-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4885-1 - It was discovered that Pygments incorrectly handled parsing SML files. If a user or automated system were tricked into parsing a specially crafted SML file, a remote attacker could cause Pygments to hang, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-20270
MD5 | a3a85071b4f559e38a297f2f2c2cd26b
Ubuntu Security Notice USN-4884-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4884-1 - Loris Reiff discovered that the BPF implementation in the Linux kernel did not properly validate attributes in the getsockopt BPF hook. A local attacker could possibly use this to cause a denial of service. It was discovered that the priority inheritance futex implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. 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-2021-20194, CVE-2021-3347, CVE-2021-3348
MD5 | d65259f1229a869c8e40f8221cabfb17
Ubuntu Security Notice USN-4883-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4883-1 - Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-27363, CVE-2021-27364, CVE-2021-27365
MD5 | f8ee214038707c269cc83f16f2f86c1a
Ubuntu Security Notice USN-4882-1
Posted Mar 19, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4882-1 - It was discovered that the Ruby JSON gem incorrectly handled certain JSON files. If a user or automated system were tricked into parsing a specially crafted JSON file, a remote attacker could use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Ruby incorrectly handled certain socket memory operations. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Various other issues were also addressed.

tags | advisory, remote, arbitrary, ruby
systems | linux, ubuntu
advisories | CVE-2020-10663, CVE-2020-10933, CVE-2020-25613
MD5 | 81a24afb7b9477db4f4abcf41514d69d
Ubuntu Security Notice USN-4881-1
Posted Mar 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4881-1 - It was discovered that containerd incorrectly handled certain environment variables. Contrary to expectations, a container could receive environment variables defined for a different container, possibly containing sensitive information.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2021-21334
MD5 | c4c30ba0884692b85f8be193652cfcb2
Ubuntu Security Notice USN-4880-1
Posted Mar 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4880-1 - It was discovered that OpenJPEG incorrectly handled certain image data. An attacker could use this issue to cause OpenJPEG to crash, leading to a denial of service, or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-27814, CVE-2020-27845
MD5 | 4455b6e61dedb1e35e31480d0ee21df6
Ubuntu Security Notice USN-4879-1
Posted Mar 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4879-1 - It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Loris Reiff discovered that the BPF implementation in the Linux kernel did not properly validate attributes in the getsockopt BPF hook. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-36158, CVE-2021-20194
MD5 | 4d75b22b9bc6edb7b6c9d1c218599d71
Ubuntu Security Notice USN-4878-1
Posted Mar 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4878-1 - It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Ryota Shiga discovered that the sockopt BPF hooks in the Linux kernel could allow a user space program to probe for valid kernel addresses. A local attacker could use this to ease exploitation of another kernel vulnerability. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-36158, CVE-2021-20239, CVE-2021-3178, CVE-2021-3347
MD5 | 9b326d87c15055059d2d831783328661
Ubuntu Security Notice USN-4877-1
Posted Mar 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4877-1 - It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. 吴异 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-36158, CVE-2021-3178
MD5 | 65a91b8f952c6c1ea32e71f869620dae
Ubuntu Security Notice USN-4876-1
Posted Mar 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4876-1 - Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. 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-2020-29569, CVE-2020-36158, CVE-2021-3178
MD5 | 450e71cf2aeed3c895c44fb3b0270291
Ubuntu Security Notice USN-4764-1
Posted Mar 15, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4764-1 - It was discovered that GLib incorrectly handled certain symlinks when replacing files. If a user or automated system were tricked into extracting a specially crafted file with File Roller, a remote attacker could possibly create files outside of the intended directory.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2021-28153
MD5 | 6f8491496f4f4196b8a9436b8e3cfd0f
Ubuntu Security Notice USN-4754-3
Posted Mar 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4754-3 - USN-4754-1 fixed vulnerabilities in Python. This update provides the corresponding updates for Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. In the case of Python 2.7 for 20.04 ESM, these additional fixes are included: It was discovered that Python allowed remote attackers to cause a denial of service via a ZIP bomb. It was discovered that Python had potentially misleading information about whether sorting occurs. This fix updates the documentation about it. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability, python
systems | linux, ubuntu
advisories | CVE-2019-17514, CVE-2019-20907, CVE-2019-9674, CVE-2020-26116, CVE-2020-27619, CVE-2020-8492
MD5 | 67d5415d4b4e952d651e9fc905a209c3
Ubuntu Security Notice USN-4763-1
Posted Mar 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4763-1 - It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. It was discovered that Pillow incorrectly handled certain Tiff image files. If a user or automated system were tricked into opening a specially-crafted Tiff file, a remote attacker could cause Pillow 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-2021-25289, CVE-2021-25290, CVE-2021-25291, CVE-2021-25292, CVE-2021-25293, CVE-2021-27921, CVE-2021-27922
MD5 | a9bb486c2183b003050adf13de2c0c65
Ubuntu Security Notice USN-4762-1
Posted Mar 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4762-1 - It was discovered that the OpenSSH ssh-agent incorrectly handled memory. A remote attacker able to connect to the agent could use this issue to cause it 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-2021-28041
MD5 | 0e90f1e3a51fa95bece293da11297ac1
Ubuntu Security Notice USN-4761-1
Posted Mar 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4761-1 - Matheus Tavares discovered that Git incorrectly handled delay-capable clean/smudge filters when being used on case-insensitive filesystems. A remote attacker could possibly use this issue to execute arbitrary code.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-21300
MD5 | 7a9a215b27ae633fcf542a2b4f854615
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