| Name | CVE-2021-27921 |
| Description | Pillow before 8.1.1 allows attackers to cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for a BLP container, and thus an attempted memory allocation can be very large. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pillow (PTS) | buster, buster (security) | 5.4.1-2+deb10u3 | fixed |
| bullseye (security), bullseye | 8.1.2+dfsg-0.3+deb11u1 | fixed |
| bookworm | 9.4.0-1.1 | fixed |
| trixie | 10.0.0-1 | fixed |
| sid | 10.1.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pillow | source | stretch | (not affected) | | | |
| pillow | source | buster | 5.4.1-2+deb10u3 | | | |
| pillow | source | (unstable) | 8.1.2-1 | | | |
Notes
[stretch] - pillow <not-affected> (Vulnerable code introduced later)
https://pillow.readthedocs.io/en/stable/releasenotes/8.1.2.html
https://github.com/python-pillow/Pillow/commit/756fff33128a0b643d10518a26ad04b726dd8973
Introduced in https://github.com/python-pillow/Pillow/commit/adaa70357662a11cd4b7c0beddaad4e92164c5d9 (5.1.0)