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CVE-2021-20225

grub2: Heap out-of-bounds write in short form option parser

A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 6.7 Medium EPSS 1.0% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Ontap Select Deploy Administration Utility and 9 more
CVE-2020-9490

httpd: Push diary crash on specifically crafted HTTP/2 header

Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.

CVSS 3.1 · 7.5 High EPSS 88.8% KEV · Not listed
Vendors
Apache Canonical Debian and 4 more
Products
Http Server Ubuntu Linux Debian Linux and 25 more
CVE-2020-2659

OpenJDK: Incomplete enforcement of maxDatagramSockets limit in DatagramChannelImpl (Networking, 8231795)

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Networking). Supported versions that are affected are Java SE: 7u241 and 8u231; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.0 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

CVSS 3.1 · 3.7 Low EPSS 4.2% KEV · Not listed
Vendors
Canonical Debian Netapp and 3 more
Products
Ubuntu Linux Debian Linux Active Iq Unified Manager and 23 more
CVE-2020-2654

OpenJDK: Excessive memory usage in OID processing in X.509 certificate parsing (Libraries, 8234037)

Vulnerability in the Java SE product of Oracle Java SE (component: Libraries). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.0 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

CVSS 3.1 · 3.7 Low EPSS 4.0% KEV · Not listed
Vendors
Canonical Debian Mcafee and 4 more
Products
Ubuntu Linux Debian Linux Epolicy Orchestrator and 22 more
CVE-2020-2604

OpenJDK: Serialization filter changes via jdk.serialFilter property modification (Serialization, 8231422)

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Serialization). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS v3.0 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 3.1 · 8.1 High EPSS 4.9% KEV · Not listed
Vendors
Canonical Debian Mcafee and 4 more
Products
Ubuntu Linux Debian Linux Epolicy Orchestrator and 27 more
CVE-2020-2601

OpenJDK: Use of unsafe RSA-MD5 checksum in Kerberos TGS (Security, 8229951)

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Security). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Kerberos to compromise Java SE, Java SE Embedded. While the vulnerability is in Java SE, Java SE Embedded, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Java SE, Java SE Embedded accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.0 Base Score 6.8 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N).

CVSS 3.1 · 6.8 Medium EPSS 4.3% KEV · Not listed
Vendors
Canonical Debian Netapp and 3 more
Products
Ubuntu Linux Debian Linux Active Iq Unified Manager and 22 more
CVE-2020-2593

OpenJDK: Incorrect isBuiltinStreamHandler check causing URL normalization issues (Networking, 8228548)

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Networking). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Java SE, Java SE Embedded accessible data as well as unauthorized read access to a subset of Java SE, Java SE Embedded accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.0 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

CVSS 3.1 · 4.8 Medium EPSS 3.0% KEV · Not listed
Vendors
Canonical Debian Mcafee and 4 more
Products
Ubuntu Linux Debian Linux Epolicy Orchestrator and 24 more
CVE-2020-2583

OpenJDK: Incorrect exception processing during deserialization in BeanContextSupport (Serialization, 8224909)

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Serialization). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.0 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

CVSS 3.1 · 3.7 Low EPSS 4.0% KEV · Not listed
Vendors
Canonical Debian Mcafee and 4 more
Products
Ubuntu Linux Debian Linux Epolicy Orchestrator and 24 more
CVE-2020-27779

grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Ontap Select Deploy Administration Utility and 9 more
CVE-2020-27749

grub2: Stack buffer overflow in grub_parser_split_cmdline()

A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Ontap Select Deploy Administration Utility and 9 more
CVE-2020-25719

samba: Samba AD DC did not always rely on the SID and PAC in Kerberos tickets

A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise.

CVSS 3.1 · 7.2 High EPSS 1.7% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 2 more
Products
Ubuntu Linux Debian Linux Fedora and 15 more
CVE-2020-25717

samba: Active Directory (AD) domain user could become root on domain members

A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.

CVSS 3.1 · 8.1 High EPSS 1.7% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 2 more
Products
Ubuntu Linux Debian Linux Fedora and 25 more
CVE-2020-25647

grub2: Out-of-bounds write in grub_usb_device_initialize()

A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Ontap Select Deploy Administration Utility and 9 more
CVE-2020-25632

grub2: Use-after-free in rmmod command

A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 8.2 High EPSS 1.2% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Ontap Select Deploy Administration Utility and 9 more
CVE-2020-14372

grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.

CVSS 3.1 · 7.5 High EPSS 1.7% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp and 1 more
Products
Fedora Grub2 Cloud Backup and 10 more
CVE-2020-14311

grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow

There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Gnu Opensuse and 1 more
Products
Ubuntu Linux Grub2 Leap and 8 more
CVE-2020-14310

grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow

There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.

CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Gnu Opensuse and 1 more
Products
Ubuntu Linux Grub2 Leap and 8 more
CVE-2020-10711

Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic

A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.

CVSS 3.1 · 5.9 Medium EPSS 3.1% KEV · Not listed
Vendors
Canonical Debian Linux and 2 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 14 more
CVE-2019-9959

poppler: integer overflow in JPXStream::init function leading to memory consumption

The JPXStream::init function in Poppler 0.78.0 and earlier doesn't check for negative values of stream length, leading to an Integer Overflow, thereby making it possible to allocate a large memory chunk on the heap, with a size controlled by an attacker, as demonstrated by pdftocairo.

CVSS 3.1 · 6.5 Medium EPSS 1.9% KEV · Not listed
Vendors
Debian Fedoraproject Freedesktop and 1 more
Products
Debian Linux Fedora Poppler and 4 more
CVE-2019-9903

poppler: stack consumption in function Dict::find() in Dict.cc

PDFDoc::markObject in PDFDoc.cc in Poppler 0.74.0 mishandles dict marking, leading to stack consumption in the function Dict::find() located at Dict.cc, which can (for example) be triggered by passing a crafted pdf file to the pdfunite binary.

CVSS 3.1 · 6.5 Medium EPSS 2.4% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 2 more
Products
Ubuntu Linux Debian Linux Fedora and 5 more