CVE-2021-32773
In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the `handin-server` system, it is not possible to work around this problem and upgrading is required.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.87% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-441, CWE-610
- Affected
- racket-lang/racket
- Source
- security-advisories@github.com
References
- https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1Patch, Third Party Advisory
- https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937cThird Party Advisory
- https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1Patch, Third Party Advisory
- https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937cThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.