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Files from Ubuntu

Email addresssecurity at ubuntu.com
First Active2004-10-28
Last Active2021-06-22
Ubuntu Security Notice USN-4995-1
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4995-1 - 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, spoof the UI, bypass security restrictions, 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 spoof a website and trick the user into providing credentials. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, windows, ubuntu
advisories | CVE-2021-23961, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29948, CVE-2021-29949, CVE-2021-29956, CVE-2021-29957
MD5 | 20dc83202964373baf16304f35c94c5a
Ubuntu Security Notice USN-4996-2
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4996-2 - USN-4996-1 fixed several vulnerabilities in OpenEXR. This update provides the corresponding update for Ubuntu 16.04 ESM. It was discovered that OpenEXR incorrectly handled certain malformed EXR image files. If a user were tricked into opening a crafted EXR image file, a remote attacker could cause 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-2021-20296, CVE-2021-3605
MD5 | de99dc4a308ddeae7347e5cfbf070a7a
Ubuntu Security Notice USN-4996-1
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4996-1 - It was discovered that OpenEXR incorrectly handled certain malformed EXR image files. If a user were tricked into opening a crafted EXR image file, a remote attacker could cause a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-20296, CVE-2021-3605
MD5 | b93dcc816616eb15d58ff43abf8f5dfb
Ubuntu Security Notice USN-4994-2
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4994-2 - USN-4994-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Antonio Morales discovered that the Apache mod_auth_digest module incorrectly handled certain Digest nonces. A remote attacker could possibly use this issue to cause Apache 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-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641
MD5 | 660fa56849544234d133450e4f7d0b84
Ubuntu Security Notice USN-4994-1
Posted Jun 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4994-1 - Marc Stern discovered that the Apache mod_proxy_http module incorrectly handled certain requests. A remote attacker could possibly use this issue to cause Apache to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. Antonio Morales discovered that the Apache mod_auth_digest module incorrectly handled certain Digest nonces. A remote attacker could possibly use this issue to cause Apache 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-2020-13950, CVE-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641
MD5 | 5541c6df78d894101aa9435f63731c3c
Ubuntu Security Notice USN-4993-1
Posted Jun 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4993-1 - Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT tokens. A local attacker could possibly use this issue to validate tokens using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly handled STARTTLS when using the SMTP submission service. A remote attacker could possibly use this issue to inject plaintext commands before STARTTLS negotiation. Various other issues were also addressed.

tags | advisory, remote, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2021-29157, CVE-2021-33515
MD5 | 0623f1197a6e81b8976f172980a21131
Ubuntu Security Notice USN-4992-1
Posted Jun 18, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4992-1 - Máté Kukri discovered that the acpi command in GRUB 2 allowed privileged users to load crafted ACPI tables when secure boot is enabled. An attacker could use this to bypass UEFI Secure Boot restrictions. Chris Coulson discovered that the rmmod command in GRUB 2 contained a use- after-free vulnerability. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. Chris Coulson discovered that a buffer overflow existed in the command line parser in GRUB 2. A local attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. Various other issues were also addressed.

tags | advisory, overflow, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | dff2b276f9a26bd8c18d23b8b7ad805d
Ubuntu Security Notice USN-4991-1
Posted Jun 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4991-1 - Yunho Kim discovered that libxml2 incorrectly handled certain error conditions. A remote attacker could exploit this with a crafted XML file to cause a denial of service, or possibly cause libxml2 to expose sensitive information. This issue only affected Ubuntu 14.04 ESM, and Ubuntu 16.04 ESM. Zhipeng Xie discovered that libxml2 incorrectly handled certain XML schemas. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 LTS. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-8872, CVE-2019-20388, CVE-2020-24977, CVE-2021-3517, CVE-2021-3537, CVE-2021-3541
MD5 | 3a41fa516f8c9d479efa94e90eb46556
Ubuntu Security Notice USN-4990-1
Posted Jun 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4990-1 - It was discovered that Nettle incorrectly handled RSA decryption. A remote attacker could possibly use this issue to cause Nettle to crash, resulting in a denial of service. It was discovered that Nettle incorrectly handled certain padding oracles. A remote attacker could possibly use this issue to perform a variant of the Bleichenbacher attack. This issue only affected Ubuntu 18.04 LTS. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-16869, CVE-2021-3580
MD5 | 31ccc40b3dc2b69667611056d0d56223
Ubuntu Security Notice USN-4989-2
Posted Jun 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4989-2 - USN-4989-1 fixed several vulnerabilities in BlueZ. This update provides the corresponding update for Ubuntu 16.04 ESM. It was discovered that BlueZ incorrectly checked certain permissions when pairing. A local attacker could possibly use this issue to impersonate devices. Various other issues were also addressed.

tags | advisory, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-26558, CVE-2020-27153
MD5 | cc5458351241b8662dc901aa7976092e
Ubuntu Security Notice USN-4989-1
Posted Jun 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4989-1 - It was discovered that BlueZ incorrectly checked certain permissions when pairing. A local attacker could possibly use this issue to impersonate devices. Jay LV discovered that BlueZ incorrectly handled redundant disconnect MGMT events. A local attacker could use this issue to cause BlueZ to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2020-26558, CVE-2020-27153, CVE-2021-3588
MD5 | 9bddaf7808213fef5017a3935246b0ca
Ubuntu Security Notice USN-4988-1
Posted Jun 15, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4988-1 - It was discovered that ImageMagick incorrectly handled certain malformed image files. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2017-14528, CVE-2020-25674, CVE-2020-27751, CVE-2020-27756, CVE-2020-27760, CVE-2020-27764, CVE-2020-27768, CVE-2020-27772, CVE-2020-27776
MD5 | 248e6bfc6469e4199e9f48da82bb137e
Ubuntu Security Notice USN-4986-4
Posted Jun 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4986-4 - USN-4986-1 fixed a vulnerability in rpcbind. The update caused a regression resulting in rpcbind crashing in certain environments. This update fixes the problem for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that rpcbind incorrectly handled certain large data sizes. A remote attacker could use this issue to cause rpcbind to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
MD5 | e017df85e7106d749ab541aaeb74a8c8
Ubuntu Security Notice USN-4987-1
Posted Jun 11, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4987-1 - It was discovered that ExifTool did not properly sanitize user data for the DjVu file format. An attacker could use this vulnerability to cause a DoS or possibly execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-22204
MD5 | 0f6aa21e3994b529d9e4f766ebc03576
Ubuntu Security Notice USN-4986-3
Posted Jun 11, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4986-3 - USN-4986-1 fixed a vulnerability in rpcbind. The update caused a regression resulting in rpcbind crashing in certain environments. This update fixes the problem. It was discovered that rpcbind incorrectly handled certain large data sizes. A remote attacker could use this issue to cause rpcbind to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
MD5 | 41e7676309c0599e059017688e4bcef3
Ubuntu Security Notice USN-4971-2
Posted Jun 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4971-2 - USN-4971-1 fixed several vulnerabilities in libwebp. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that libwebp incorrectly handled certain malformed images. If a user or automated system were tricked into opening a specially crafted image file, a remote attacker could use this issue to cause libwebp 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-2018-25009, CVE-2018-25013, CVE-2020-36330
MD5 | b82d64cb41adba3b71d4830ad200f0c4
Ubuntu Security Notice USN-4986-2
Posted Jun 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4986-2 - USN-4986-1 fixed a vulnerability in rpcbind. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that rpcbind incorrectly handled certain large data sizes. A remote attacker could use this issue to cause rpcbind to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-8779
MD5 | f64dfbe9dd90729f061e62aa07a702bc
Ubuntu Security Notice USN-4986-1
Posted Jun 9, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4986-1 - It was discovered that rpcbind incorrectly handled certain large data sizes. A remote attacker could use this issue to cause rpcbind to consume resources, leading to a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-8779
MD5 | 2d41b465465adc3f25b4a1ccaaca2bf1
Ubuntu Security Notice USN-4985-1
Posted Jun 9, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4985-1 - It was discovered that some Intel processors may not properly invalidate cache entries used by Intel Virtualization Technology for Directed I/O. This may allow a local user to perform a privilege escalation attack. Joseph Nuzman discovered that some Intel processors may not properly apply EIBRS mitigations and hence may allow unauthorized memory reads via sidechannel attacks. A local attacker could use this to expose sensitive information, including kernel memory. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-24511, CVE-2020-24512, CVE-2020-24513, CVE-2021-24489
MD5 | beb2b2abe71fcc95119548688bead874
Ubuntu Security Notice USN-4937-2
Posted Jun 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4937-2 - USN-4937-1 fixed a vulnerability in GNOME Autoar. The update caused a regression when extracting certain archives. This update fixes the problem. Ondrej Holy discovered that GNOME Autoar could extract files outside of the intended directory. If a user were tricked into extracting a specially crafted archive, a remote attacker could create files in arbitrary locations, possibly leading to code execution. Various other issues were also addressed.

tags | advisory, remote, arbitrary, code execution
systems | linux, ubuntu
MD5 | 56203d8395d3d051ed05e8cd62776087
Ubuntu Security Notice USN-4969-3
Posted Jun 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4969-3 - USN-4969-1 fixed a vulnerability in DHCP. The package for Ubuntu 21.04 introduced a regression causing it to reject certain valid configuration files. This update fixes the problem. Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
MD5 | 9fe00e0f535c93884b6a5a03be92540a
Ubuntu Security Notice USN-4984-1
Posted Jun 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4984-1 - Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the Realtek RTL8188EU Wireless device driver in the Linux kernel did not properly validate ssid lengths in some situations. An attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2021-28038, CVE-2021-28660, CVE-2021-28688, CVE-2021-28950, CVE-2021-28952, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29647, CVE-2021-30002, CVE-2021-31916, CVE-2021-33033, CVE-2021-3483
MD5 | ef9bb22f3bfa67465b7e2c92a0636737
Ubuntu Security Notice USN-4983-1
Posted Jun 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4983-1 - Piotr Krysiuk discovered that the eBPF implementation in the Linux kernel did not properly enforce limits for pointer operations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Piotr Krysiuk and Benedict Schlueter discovered that the eBPF implementation in the Linux kernel performed out of bounds speculation on pointer arithmetic. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-29155, CVE-2021-31829, CVE-2021-33200, CVE-2021-3501
MD5 | 18944e6d71f08e1228485e41148d89d4
Ubuntu Security Notice USN-4982-1
Posted Jun 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4982-1 - Kiyin discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service. Kiyin discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. 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-2020-25670, CVE-2020-25673, CVE-2021-28688, CVE-2021-28950, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29264, CVE-2021-29647, CVE-2021-31916, CVE-2021-3483
MD5 | 48fb2674411f417202ce07ced0925537
Ubuntu Security Notice USN-4981-1
Posted Jun 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4981-1 - Joshua Rogers discovered that Squid incorrectly handled requests with the urn: scheme. A remote attacker could possibly use this issue to cause Squid to consume resources, leading to a denial of service. Joshua Rogers discovered that Squid incorrectly handled requests to the Cache Manager API. A remote attacker with access privileges could possibly use this issue to cause Squid to consume resources, leading to a denial of service. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-28651, CVE-2021-28652, CVE-2021-28662, CVE-2021-31807, CVE-2021-31808, CVE-2021-33620
MD5 | dc785af17f095adce3188290ba6dc2cb
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