GHSA-fm67-cv37-96ff — medium GitHub Advisory (CVE-2022-31117) in pip/ujson

Description

What kind of vulnerability is it? Who is impacted?

When an error occurs while reallocating the buffer for string decoding, the buffer gets freed twice.

Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python.

Has the problem been patched? What versions should users upgrade to?

Users should upgrade to UltraJSON 5.4.0.

Is there a way for users to fix or remediate the vulnerability without upgrading?

There is no workaround.

If you have any questions or comments about this advisory:
* Open an issue in UltraJSON

Score	Percentile
0.17%	38.51%

Base score	Version	Severity	Vector
5.9	3.1	—	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.

Type	Value
GHSA	GHSA-fm67-cv37-96ff ↗
CVE	CVE-2022-31117 ↗

CWE id	Name
CWE-415	Double Free

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

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
pip	ujson	< 5.4.0	5.4.0	—