Janet Lang
Monthly
Integer overflow in the Janet scripting language's fiber unmarshaling routine (versions up to 1.41.0) allows a local authenticated attacker to cause a denial-of-service condition. The vulnerable function `unmarshal_one_fiber` in `src/core/marsh.c` performs an unchecked addition when computing fiber stack capacity - if `fiber_stacktop` is near INT32_MAX, adding 10 wraps the value, resulting in a dangerously small capacity allocation that crashes the interpreter. No public exploitation in production environments has been confirmed (not listed in CISA KEV), but a public proof-of-concept exploit exists, and the upstream patch has been released as commit d9b1d711.
A vulnerability was identified in janet-lang janet up to 1.40.1. Affected by this vulnerability is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. [CVSS 3.3 LOW]
A vulnerability was determined in janet-lang janet up to 1.40.1. This impacts the function janetc_if of the file src/core/specials.c. [CVSS 3.3 LOW]
A vulnerability was found in janet-lang janet up to 1.40.1. This affects the function os_strftime of the file src/core/os.c. [CVSS 3.3 LOW]
A vulnerability has been found in janet-lang janet up to 1.40.1. The impacted element is the function janetc_pop_funcdef of the file src/core/compile.c. [CVSS 3.3 LOW]
Janet before 1.22.0 mishandles arrays. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Integer overflow in the Janet scripting language's fiber unmarshaling routine (versions up to 1.41.0) allows a local authenticated attacker to cause a denial-of-service condition. The vulnerable function `unmarshal_one_fiber` in `src/core/marsh.c` performs an unchecked addition when computing fiber stack capacity - if `fiber_stacktop` is near INT32_MAX, adding 10 wraps the value, resulting in a dangerously small capacity allocation that crashes the interpreter. No public exploitation in production environments has been confirmed (not listed in CISA KEV), but a public proof-of-concept exploit exists, and the upstream patch has been released as commit d9b1d711.
A vulnerability was identified in janet-lang janet up to 1.40.1. Affected by this vulnerability is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. [CVSS 3.3 LOW]
A vulnerability was determined in janet-lang janet up to 1.40.1. This impacts the function janetc_if of the file src/core/specials.c. [CVSS 3.3 LOW]
A vulnerability was found in janet-lang janet up to 1.40.1. This affects the function os_strftime of the file src/core/os.c. [CVSS 3.3 LOW]
A vulnerability has been found in janet-lang janet up to 1.40.1. The impacted element is the function janetc_pop_funcdef of the file src/core/compile.c. [CVSS 3.3 LOW]
Janet before 1.22.0 mishandles arrays. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.