USN-4343-1: Linux kernel vulnerability

Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service system crash or execute arbitrary code...

USN-4341-1: Samba vulnerabilities

Andrei Popa discovered that Samba incorrectly handled certain LDAP queries. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 19.10 and Ubuntu 20.04 LTS. CVE-2020-10700 It was...

USN-4338-2: re2c vulnerability

USN-4338-1 fixed vulnerabilities in re2c. This update provides the corresponding update for Ubuntu 20.04 LTS. Original advisory details: Agostino Sarubbo discovered that re2c incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code...

USN-4332-2: File Roller vulnerability

USN-4332-1 fixed vulnerabilities in File Roller. This update provides the corresponding update for Ubuntu 20.04 LTS. Original advisory details: It was discovered that File Roller incorrectly handled symlinks. An attacker could possibly use this issue to expose sensitive information...

USN-4340-1: CUPS vulnerabilities

It was discovered that CUPS incorrectly handled certain language values. A local attacker could possibly use this issue to cause CUPS to crash, leading to a denial of service, or possibly obtain sensitive information. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 19.10...

USN-4339-1: OpenEXR vulnerabilities

Brandon Perry 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. This issue only applied to Ubuntu 20.04 LTS...

USN-4338-1: re2c vulnerability

Agostino Sarubbo discovered that re2c incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code...

USN-4337-1: OpenJDK vulnerabilities

It was discovered that OpenJDK incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service while processing a specially crafted regular expression. CVE-2020-2754, CVE-2020-2755 It was discovered that OpenJDK incorrectly handled class...

USN-4336-1: GNU binutils vulnerabilities

It was discovered that GNU binutils contained a large number of security issues. If a user or automated system were tricked into processing a specially-crafted file, a remote attacker could cause GNU binutils to crash, resulting in a denial of service, or possibly execute arbitrary code...

USN-4335-1: Thunderbird vulnerabilities

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, obtain sensitive information, bypass security restrictions, bypass same-origin...

USN-4333-1: Python vulnerabilities

It was discovered that Python incorrectly stripped certain characters from requests. A remote attacker could use this issue to perform CRLF injection. CVE-2019-18348 It was discovered that Python incorrectly handled certain HTTP requests. An attacker could possibly use this issue to cause a denia...

USN-4334-1: Git vulnerability

Carlo Arenas discovered that Git incorrectly handled certain URLs containing newlines, empty hosts, or lacking a scheme. A remote attacker could possibly use this issue to trick Git into returning credential information for a wrong host...

USN-4332-1: File Roller vulnerability

It was discovered that File Roller incorrectly handled symlinks. An attacker could possibly use this issue to expose sensitive information...

USN-4331-1: WebKitGTK+ vulnerability

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...

USN-4330-1: PHP vulnerabilities

It was discovered that PHP incorrectly handled certain file uploads. An attacker could possibly use this issue to cause a crash. CVE-2020-7062 It was discovered that PHP incorrectly handled certain PHAR archive files. An attacker could possibly use this issue to access sensitive information...

USN-4329-1: Git vulnerability

Felix Wilhelm discovered that Git incorrectly handled certain URLs that included newlines. A remote attacker could possibly use this issue to trick Git into returning credential information for a wrong host...

USN-4328-1: Thunderbird vulnerabilities

It was discovered that Message ID calculation was based on uninitialized data. An attacker could potentially exploit this to obtain sensitive information. CVE-2020-6792 Mutiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted message, an...

USN-4319-1: Linux kernel vulnerabilities

It was discovered that the IPMI message handler implementation in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service kernel memory exhaustion. CVE-2019-19046 Al Viro discovered that the vfs layer in the Linux...

LSN-0065-1: Kernel Live Patch Security Notice

Andrew Honig reported a flaw in the way KVM Kernel-based Virtual Machine emulated the IOAPIC. A privileged guest user could exploit this flaw to read host memory or cause a denial of service crash the host. CVE-2013-1798 It was discovered that the KVM implementation in the Linux kernel, when...

USN-4327-1: libssh vulnerability

Yasheng Yang discovered that libssh incorrectly handled AES-CTR ciphers. A remote attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service...

USN-4326-1: libiberty vulnerabilities

It was discovered that libiberty incorrectly handled parsing certain binaries. If a user or automated system were tricked into processing a specially crafted binary, a remote attacker could use this issue to cause libiberty to crash, resulting in a denial of service, or possibly execute arbitrary...

USN-4325-1: Linux kernel vulnerabilities

It was discovered that the IPMI message handler implementation in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service kernel memory exhaustion. CVE-2019-19046 Al Viro discovered that the vfs layer in the Linux...

USN-4324-1: Linux kernel vulnerabilities

Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service system crash or possibly expose sensitive information kernel memory. CVE-2020-8428 Shijie Luo discovered that the ext4 file system...

USN-4323-1: Firefox vulnerabilities

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. CVE-2020-6821, CVE-2020-6822, CVE-2020-6824,...

USN-4322-1: GnuTLS vulnerability

It was discovered that GnuTLS incorrectly handled randomness when performing DTLS negotiation. A remote attacker could possibly use this issue to obtain sensitive information, contrary to expectations...

USN-4321-1: HAProxy vulnerability

Felix Wilhelm discovered that HAProxy incorrectly handled certain HTTP/2 requests. An attacker could possibly use this to execute arbitrary code...

USN-4318-1: Linux kernel vulnerabilities

Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service system crash or possibly expose sensitive information kernel memory. CVE-2020-8428 Gustavo Romero and Paul Mackerras discovered that th...

USN-4320-1: Linux kernel vulnerability

Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service system crash or possibly expose sensitive information kernel memory...

USN-4317-1: Firefox vulnerabilities

Two use-after-free bugs were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could exploit these to cause a denial of service or execute arbitrary code...

USN-4316-2: GD Graphics Library vulnerabilities

USN-4316-1 fixed a vulnerability in GD Graphics Library. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: It was discovered that GD Graphics Library incorrectly handled cloning an image. An attacker could possibly use this issue to cause GD Graphics...

USN-4316-1: GD Graphics Library vulnerabilities

It was discovered that GD Graphics Library incorrectly handled cloning an image. An attacker could possibly use this issue to cause GD Graphics Library to crash, resulting in a denial of service. CVE-2018-14553 It was discovered that GD Graphics Library incorrectly handled loading images from X...

USN-4315-1: Apport vulnerabilities

Maximilien Bourgeteau discovered that the Apport lock file was created with insecure permissions. This could allow a local attacker to escalate their privileges via a symlink attack. CVE-2020-8831 Maximilien Bourgeteau discovered a race condition in Apport when setting crash report permissions...

USN-4314-1: pam-krb5 vulnerability

Russ Allbery discovered that pam-krb5 incorrectly handled some responses. An attacker could possibly use this issue to execute arbitrary code...

USN-4313-1: Linux kernel vulnerability

Manfred Paul discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information kernel memory or gain administrative privileges...

USN-4311-1: BlueZ vulnerabilities

It was discovered that BlueZ incorrectly handled bonding HID and HOGP devices. A local attacker could possibly use this issue to impersonate non-bonded devices. CVE-2020-0556 It was discovered that BlueZ incorrectly handled certain commands. A local attacker could use this issue to cause BlueZ to...

USN-4312-1: Timeshift vulnerability

Matthias Gerstner discovered that Timeshift did not securely create temporary files. An attacker could exploit a race condition in Timeshift and potentially execute arbitrary commands as root...

USN-4310-1: WebKitGTK+ vulnerability

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...

USN-4308-2: Twisted vulnerabilities

USN-4308-1 fixed several vulnerabilities in Twisted. This update provides the corresponding update for Ubuntu 14.04 ESM. Original advisory details: it was discovered that Twisted incorrectly validated or sanitized certain URIs or HTTP methods. A remote attacker could use this issue to inject...

USN-4302-1: Linux kernel vulnerabilities

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the resources of a parent level 1 guest in certain situations. An attacker could use this to expose sensitive information. CVE-2020-2732 Gregory Herrero discovere...

USN-4301-1: Linux kernel vulnerabilities

It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information read memor...

USN-4300-1: Linux kernel vulnerabilities

It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information read memor...

USN-4134-3: IBus vulnerability

USN-4134-1 fixed a vulnerability in IBus. The update caused a regression in some Qt applications and the fix was subsequently reverted in USN-4134-2. The regression has since been resolved and so this update fixes the original vulnerability. We apologize for the inconvenience. Original advisory...

USN-4309-1: Vim vulnerabilities

It was discovered that Vim incorrectly handled certain sources. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS CVE-2017-11109 It was discovered that Vim incorrectly handled certain files. An...

USN-4308-1: Twisted vulnerabilities

it was discovered that Twisted incorrectly validated or sanitized certain URIs or HTTP methods. A remote attacker could use this issue to inject invalid characters and possibly perform header injection attacks. CVE-2019-12387 It was discovered that Twisted incorrectly verified XMPP TLS...

USN-4307-1: Apache HTTP Server update

As a security improvement, this update adds TLSv1.3 support to the Apache HTTP Server package in Ubuntu 18.04 LTS. TLSv1.3 is enabled by default, and in certain environments may cause compatibility issues. The SSLProtocol directive may be used to disable TLSv1.3 in these problematic environments...

USN-4171-5: Apport regression

USN-4171-1 fixed vulnerabilities in Apport. This caused a regression in autopkgtest and python2 compatibility. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Kevin Backhouse discovered Apport would read its user-controlled settings file as the root...

USN-4306-1: Dino vulnerabilities

It was discovered that Dino incorrectly validated inputs. An attacker could use this issue to possibly obtain, inject or remove sensitive information. This update also includes a fix to the encryption implementation in Dino to support 12 byte IVs, in addition to 16 byte IVs...

USN-4305-1: ICU vulnerability

André Bargull discovered that ICU incorrectly handled certain strings. An attacker could possibly use this issue to execute arbitrary code...

USN-4304-1: Ceph vulnerability

Or Friedman discovered that Ceph incorrectly handled disconnects. A remote authenticated attacker could possibly use this issue to cause Ceph to consume resources, leading to a denial of service...

USN-4303-1: Linux kernel vulnerability

Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested level 2 guest access the resources of a parent level 1 guest in certain situations. An attacker could use this to expose sensitive information...