A flaw has been found in mruby 3.1.0. Affected is the function udiv of the file bigint.c. Executing a manipulation can lead to floating point comparison with incorrect operator. It is possible to launch the attack remotely. The exploit has been published and may be used. It is best practice to apply a patch to resolve this issue.

mrubyc through release3.4.1 was found to contain an out-of-bounds read in builtin missing-method lookup inside mrbcfindmethod().

A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scopenew of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.

In mruby 2.1.0, there is a use-after-free in hashslice in mrbgems/mruby-hash-ext/src/hash-ext.c.

In mruby 2.1.0, there is a use-after-free in hashvaluesat in mrbgems/mruby-hash-ext/src/hash-ext.c.

In mruby 2.1.0, there is a stack-based buffer overflow in mrbstrlentodbl in string.c.

A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sortcmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.

A flaw has been found in mruby up to 3.4.0. This affects the function mrbvmexec of the file src/vm.c of the component JMPNOT-to-JMPIF Optimization. Executing a manipulation can lead to use after free. The attack needs to be launched locally. The exploit has been published and may be used. This patch is called e50f15c1c6e131fa7934355eb02b8173b13df415. It is advisable to implement a patch to correct this issue.

A weakness has been identified in mruby 3.4.0. This vulnerability affects the function aryfillexec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

A security vulnerability has been detected in mrubyc up to 3.4. This impacts the function mrbcrawrealloc of the file src/alloc.c. Such manipulation of the argument ptr leads to null pointer dereference. An attack has to be approached locally. The name of the patch is 009111904807b8567262036bf45297c3da8f1c87. It is advisable to implement a patch to correct this issue.

mruby is vulnerable to Heap-based Buffer Overflow

An Untrusted Pointer Dereference was discovered in function mrbvmexec in mruby before 3.1.0-rc. The vulnerability causes a segmentation fault and application crash.

mruby is vulnerable to NULL Pointer Dereference

mruby is vulnerable to NULL Pointer Dereference

In versions of mruby up to and including 1.4.0, a use-after-free vulnerability exists in src/io.c::File#initilializecopy(). An attacker that can cause Ruby code to be run can possibly use this to execute arbitrary code.

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrbclass, related to certain .clone usage, because mrbobjclone in kernel.c copies flags other than the MRBFLAGISFROZEN flag (e.g., the embedded flag).

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.

The markcontextstack function in gc.c in mruby through 1.2.0 allows attackers to cause a denial of service (heap-based use-after-free and application crash) or possibly have unspecified other impact via a crafted .rb file.

The CHECK macro in mrbgems/mruby-sprintf/src/sprintf.c in mruby 1.4.1 contains a signed integer overflow, possibly leading to out-of-bounds memory access because the mrbstrresize function in string.c does not check for a negative length.

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrbclassreal because "class BasicObject" is not properly supported in class.c.

The initcopy function in kernel.c in mruby 1.4.1 makes initializecopy calls for TTICLASS objects, which allows attackers to cause a denial of service (mrbhashkeys uninitialized pointer and application crash) or possibly have unspecified other impact.

In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrbvmexec() when handling OPGETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.

mruby 2.1.2 has a double free in mrbdefaultallocf (called from mrbfree and objfree).

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrbyieldwithclass function in vm.c because of incorrect VM stack handling. It can be triggered via the stackcopy function.

An untrusted pointer dereference in mrbvmexec() of mruby v3.0.0 can lead to a segmentation fault or application crash.

Use After Free in GitHub repository mruby/mruby prior to 3.2.

Out-of-bounds Read in mrbobjiskindof in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Use-After-Free in strescape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

NULL Pointer Dereference in mrbvmexec with super in GitHub repository mruby/mruby prior to 3.2. This vulnerability is capable of making the mruby interpreter crash, thus affecting the availability of the system.

heap-buffer-overflow in mrbvmexec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.