CVE-2021-28677
A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.47% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- python/pillow · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 2.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/python-pillow/Pillow/pull/5377Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28677-fix-eps-dos-on-openThird Party Advisory
- https://security.gentoo.org/glsa/202107-33Third Party Advisory
- https://github.com/python-pillow/Pillow/pull/5377Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28677-fix-eps-dos-on-openThird Party Advisory
- https://security.gentoo.org/glsa/202107-33Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.