cve,link,title,description,vendor,products,score,severity,epss,cisa,article,ransomware,exploited,poc,trended,trended_no_1,published,trended_score
CVE-2024-56737,https://securityvulnerability.io/vulnerability/CVE-2024-56737,Heap-Based Buffer Overflow in GNU GRUB2 Affected by Malicious HFS Filesystem Data,"A vulnerability exists in GNU GRUB2 (version 2.12) that is triggered by a heap-based buffer overflow. This flaw can be exploited if an attacker uses specially crafted sblock data within an HFS filesystem. Such an exploitation may lead to unauthorized access or corruption of memory, impacting the stability and security of systems utilizing this bootloader. Addressing this issue promptly is crucial for maintaining system integrity and protecting against potential threats.",Gnu,Grub2,8.8,HIGH,0.0004299999854993075,false,false,false,false,false,false,false,2024-12-29T00:00:00.000Z,0
CVE-2024-56738,https://securityvulnerability.io/vulnerability/CVE-2024-56738,Side-Channel Vulnerability in GNU GRUB Affects Multiple Versions,"The vulnerability in GNU GRUB affects versions prior to 2.12 due to the use of a non-constant-time algorithm in the grub_crypto_memcmp function. This imperfection opens the door for potential side-channel attacks, where attackers might exploit differences in processing time to infer sensitive information. Such vulnerabilities can significantly compromise the security of boot processes and the overall integrity of systems relying on GRUB for initialization.",Gnu,Grub2,5.3,MEDIUM,0.0004299999854993075,false,false,false,false,false,false,false,2024-12-29T00:00:00.000Z,0
CVE-2022-3775,https://securityvulnerability.io/vulnerability/CVE-2022-3775,,"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.",Gnu,Grub2,7.1,HIGH,0.0004400000034365803,false,false,false,false,,false,false,2022-12-19T00:00:00.000Z,0
CVE-2022-2601,https://securityvulnerability.io/vulnerability/CVE-2022-2601,,"A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.",Gnu,Grub2,8.6,HIGH,0.000750000006519258,false,false,false,false,,false,false,2022-12-14T00:00:00.000Z,0
CVE-2021-3697,https://securityvulnerability.io/vulnerability/CVE-2021-3697,,"A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.",Gnu,Grub2,7,HIGH,0.00044999999227002263,false,false,false,false,,false,false,2022-07-06T15:06:47.000Z,0
CVE-2021-3696,https://securityvulnerability.io/vulnerability/CVE-2021-3696,,"A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.",Gnu,Grub2,4.5,MEDIUM,0.0004799999878741801,false,false,false,false,,false,false,2022-07-06T15:06:43.000Z,0
CVE-2021-3695,https://securityvulnerability.io/vulnerability/CVE-2021-3695,,"A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.",Gnu,Grub2,4.5,MEDIUM,0.0004799999878741801,false,false,false,false,,false,false,2022-07-06T15:06:38.000Z,0
CVE-2021-3981,https://securityvulnerability.io/vulnerability/CVE-2021-3981,,"A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released.",Gnu,Grub2,3.3,LOW,0.00044999999227002263,false,false,false,false,,false,false,2022-03-08T14:02:15.000Z,0
CVE-2021-3418,https://securityvulnerability.io/vulnerability/CVE-2021-3418,,"If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism.",Gnu,Grub2,6.4,MEDIUM,0.0004400000034365803,false,false,false,false,,false,false,2021-03-15T21:17:52.000Z,0
CVE-2021-20233,https://securityvulnerability.io/vulnerability/CVE-2021-20233,,"A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",Gnu,Grub2,8.2,HIGH,0.0004199999966658652,false,false,false,true,true,false,false,2021-03-03T16:44:34.000Z,0
CVE-2021-20225,https://securityvulnerability.io/vulnerability/CVE-2021-20225,,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.,Gnu,Grub2,6.7,MEDIUM,0.0004199999966658652,false,false,false,false,,false,false,2021-03-03T16:44:26.000Z,0
CVE-2020-25632,https://securityvulnerability.io/vulnerability/CVE-2020-25632,,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.,Gnu,Grub2,8.2,HIGH,0.0004199999966658652,false,false,false,true,true,false,false,2021-03-03T16:40:47.000Z,0
CVE-2020-25647,https://securityvulnerability.io/vulnerability/CVE-2020-25647,,"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.",Gnu,Grub2,7.6,HIGH,0.001180000021122396,false,false,false,false,,false,false,2021-03-03T16:40:42.000Z,0
CVE-2020-14372,https://securityvulnerability.io/vulnerability/CVE-2020-14372,,"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.",Gnu,Grub2,7.5,HIGH,0.00044999999227002263,false,false,false,true,true,false,false,2021-03-03T16:40:36.000Z,0
CVE-2020-27749,https://securityvulnerability.io/vulnerability/CVE-2020-27749,,"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.",Gnu,Grub2,6.7,MEDIUM,0.0004199999966658652,false,false,false,false,,false,false,2021-03-03T16:40:30.000Z,0
CVE-2020-27779,https://securityvulnerability.io/vulnerability/CVE-2020-27779,,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.,Gnu,Grub2,7.5,HIGH,0.0004199999966658652,false,false,false,false,,false,false,2021-03-03T16:40:24.000Z,0
CVE-2015-8370,https://securityvulnerability.io/vulnerability/CVE-2015-8370,,"Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an ""Off-by-two"" or ""Out of bounds overwrite"" memory error.",Gnu,Grub2,,,0.00107999995816499,false,false,false,false,,false,false,2015-12-16T21:59:00.000Z,0