GHSA-xc76-5pf9-mx8m — high GitHub Advisory (CVE-2025-29776) in npm/azle

Description

Impact

Calling setTimer in Azle versions 0.27.0, 0.28.0, and 0.29.0 causes an immediate infinite loop of timers to be executed on the canister, each timer attempting to clean up the global state of the previous timer.

The infinite loop will occur with any valid invocation of setTimer.

Patches

The problem has been fixed as of Azle version 0.30.0.

Workarounds

If a canister is caught in this infinite loop after calling setTimer, the canister can be upgraded and the timers will all be cleared, thus ending the loop.

Basic information

Type: reviewed
Severity: high
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2025-03-14 17:31:07 UTC
Updated: 2025-03-14 17:31:08 UTC
GitHub reviewed: 2025-03-14 17:31:07 UTC
NVD published: 2025-03-14

Score	Percentile
0.07%	21.49%

CVSS Scores

Base score	Version	Severity	Vector
8.7	4.0	—	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network. Attack complexity (AC:L) Exploitation conditions are straightforward and stable. Attack requirements (AT:N) No additional preconditions are required beyond normal reachability. Privileges required (PR:N) No privileges are required. User interaction (UI:N) No user interaction is required. Vulnerable system confidentiality impact (VC:N) No confidentiality impact on the vulnerable system. Vulnerable system integrity impact (VI:N) No integrity impact on the vulnerable system. Vulnerable system availability impact (VA:H) High availability impact on the vulnerable system. Subsequent system confidentiality impact (SC:N) No confidentiality impact on subsequent systems. Subsequent system integrity impact (SI:N) No integrity impact on subsequent systems. Subsequent system availability impact (SA:L) Limited availability impact on subsequent systems.

Identifiers

Type	Value
GHSA	GHSA-xc76-5pf9-mx8m ↗
CVE	CVE-2025-29776 ↗

CWEs

CWE id	Name
CWE-835	Loop with Unreachable Exit Condition ('Infinite Loop')

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	azle	>= 0.27.0, < 0.30.0	0.30.0	—

In Azle, calling `setTimer` causes infinite loop of timers