Vulnerability in Python Pillow
CVE-2021-28678
An issue was discovered in Pillow before 8.2.0. For BLP data, BlpImagePlugin did not properly check that reads (after jumping to file offsets) returned data. This could lead to a DoS where the decoder could be run a large number of times on empty data.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Python Pillow
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html (Release Notes, Vendor Advisory)
- github.com/python-pillow/Pillow/pull/5377 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202107-33 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28678?
- CVE-2021-28678 is a medium-severity vulnerability in Python Pillow, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.5/10. Published 2021-06-02.
- How severe is CVE-2021-28678?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-28678 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.