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Advisory Files

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
Red Hat Security Advisory 2021-2264-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2264-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.11.0.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-29956, CVE-2021-29957, CVE-2021-29967
MD5 | ef1492b960c68f40aabf76b03228dc92
Red Hat Security Advisory 2021-2260-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2260-01 - The libwebp packages provide a library and tools for the WebP graphics format. WebP is an image format with a lossy compression of digital photographic images. WebP consists of a codec based on the VP8 format, and a container based on the Resource Interchange File Format. Webmasters, web developers and browser developers can use WebP to compress, archive, and distribute digital images more efficiently. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2018-25011, CVE-2020-36328, CVE-2020-36329
MD5 | c8afdc0122779702fef6a4818c1346fc
Red Hat Security Advisory 2021-2263-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2263-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.11.0.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-29956, CVE-2021-29957, CVE-2021-29967
MD5 | 38ec159abb9d5371e78b15a713c696c8
Red Hat Security Advisory 2021-2261-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2261-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.11.0.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-29956, CVE-2021-29957, CVE-2021-29967
MD5 | ab08db1474a4090c066915139ba6b34f
Red Hat Security Advisory 2021-2259-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2259-01 - nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.

tags | advisory, web, protocol
systems | linux, redhat
advisories | CVE-2021-23017
MD5 | c022d6a685c4da17a916f5ea74df4c4f
Red Hat Security Advisory 2021-2262-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2262-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.11.0.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-29956, CVE-2021-29957, CVE-2021-29967
MD5 | 7e0881004bac73d66566106a3c50d496
Red Hat Security Advisory 2021-2258-01
Posted Jun 7, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2258-01 - nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.

tags | advisory, web, protocol
systems | linux, redhat
advisories | CVE-2021-23017
MD5 | 5f82b38331d93b1a18c80aa73a2c54f0
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
Ubuntu Security Notice USN-4980-1
Posted Jun 3, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4980-1 - Kevin Backhouse discovered that polkit incorrectly handled errors in the polkit_system_bus_name_get_creds_sync function. A local attacker could possibly use this issue to escalate privileges.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2021-3560
MD5 | 90a3ffe491849f5a84754e4a9c0f6641
Red Hat Security Advisory 2021-2229-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2229-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks. Issues addressed include a HTTP request smuggling vulnerability.

tags | advisory, web, ruby
systems | linux, redhat
advisories | CVE-2020-25613, CVE-2021-28965
MD5 | cea33ad0e2b62557766732321333596d
Red Hat Security Advisory 2021-2230-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2230-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks. Issues addressed include HTTP request smuggling, HTTP response splitting, denial of service, information leakage, and insecure permissions vulnerabilities.

tags | advisory, web, denial of service, vulnerability, ruby
systems | linux, redhat
advisories | CVE-2019-15845, CVE-2019-16201, CVE-2019-16254, CVE-2019-16255, CVE-2019-3881, CVE-2020-10663, CVE-2020-10933, CVE-2020-25613, CVE-2021-28965
MD5 | e3874da2921faf9eb845a84c5bf2d476
Red Hat Security Advisory 2021-2238-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2238-01 - The polkit packages provide a component for controlling system-wide privileges. This component provides a uniform and organized way for non-privileged processes to communicate with privileged ones. Issues addressed include a privilege escalation vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-3560
MD5 | 44ea276e2a9b9351b510e971657f91a3
Red Hat Security Advisory 2021-2235-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2235-01 - The Public Key Infrastructure Core contains fundamental packages required by Red Hat Certificate System. Issues addressed include a bypass vulnerability.

tags | advisory, bypass
systems | linux, redhat
advisories | CVE-2021-3551
MD5 | 77051894d54adad2878c960511e90f5c
Red Hat Security Advisory 2021-2237-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2237-01 - The polkit packages provide a component for controlling system-wide privileges. This component provides a uniform and organized way for non-privileged processes to communicate with privileged ones. Issues addressed include a privilege escalation vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-3560
MD5 | ce9c6e70684ac6688c8fe1576f7e4387
Red Hat Security Advisory 2021-2243-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2243-01 - Rust Toolset provides the Rust programming language compiler rustc, the cargo build tool and dependency manager, the cargo-vendor plugin, and required libraries. This enhancement update adds the rust-toolset-1.49 packages to Red Hat Developer Tools. Issues addressed include double free and use-after-free vulnerabilities.

tags | advisory, vulnerability
systems | linux, redhat
advisories | CVE-2020-36317, CVE-2020-36318
MD5 | 777df082ece18a624d2ead49dd5cb7dd
Red Hat Security Advisory 2021-2239-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2239-01 - The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Issues addressed include buffer overflow, denial of service, and integer overflow vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-25659, CVE-2020-28196, CVE-2020-36242
MD5 | 365f1ad26e6efd06364c29b4976ba110
Red Hat Security Advisory 2021-2233-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2233-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.11.0 ESR.

tags | advisory, web
systems | linux, redhat
advisories | CVE-2021-29967
MD5 | 866197a91446ad6261986ed4478850e6
Red Hat Security Advisory 2021-2236-01
Posted Jun 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2236-01 - The polkit packages provide a component for controlling system-wide privileges. This component provides a uniform and organized way for non-privileged processes to communicate with privileged ones. Issues addressed include a privilege escalation vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-3560
MD5 | 171dc563821d453b5508b8ea17ee3edf
Ubuntu Security Notice USN-4979-1
Posted Jun 3, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4979-1 - 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-2021-28660, CVE-2021-28964, CVE-2021-28971, CVE-2021-28972, CVE-2021-29647, CVE-2021-31916, CVE-2021-33033, CVE-2021-3428, CVE-2021-3483
MD5 | 3034b897d2745e89ae5688e5b2c226c9
Ubuntu Security Notice USN-4978-1
Posted Jun 3, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4978-1 - 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, re-enable camera devices without an additional permission prompt, spoof the browser UI, or execute arbitrary code. It was discovered that filenames printed from private browsing mode were incorrectly retained in preferences. A local attacker could potentially exploit this to obtain sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local, spoof
systems | linux, ubuntu
advisories | CVE-2021-29959, CVE-2021-29960, CVE-2021-29966, CVE-2021-29967
MD5 | 01e79350aca3fc8a59ec16c81063b717
Ubuntu Security Notice USN-4977-1
Posted Jun 3, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4977-1 - 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-2021-29155, CVE-2021-3501
MD5 | beb0471b09c906908cd367b5a8f72ecc
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