Out-of-bounds Read in Python Pillow
CVE-2021-23437
The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.
Vulnerability class: Buffer Overflow
EPSS: 0.032 (86.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Python Pillow
- Fedoraproject Fedora — versions 33, 34
- N/a Pillow — versions 0, unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- report@snyk.io (Exploit, Patch, Third Party Advisory, Release Notes)
- report@snyk.io (Release Notes, Vendor Advisory)
- report@snyk.io (Patch, Third Party Advisory)
- report@snyk.io (vendor-advisory)
- report@snyk.io (vendor-advisory)
- report@snyk.io (vendor-advisory, Third Party Advisory)
- report@snyk.io (mailing-list)
Frequently asked questions
- What is CVE-2021-23437?
- CVE-2021-23437 is a high-severity vulnerability in Python Pillow, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-09-03.
- How severe is CVE-2021-23437?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-23437 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.