CVE-2021-25289 — Out-of-bounds Write in Pillow

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow11 documents9 sources
Severity
9.8CRITICALNVD
CNA8.8GHSA8.8OSV8.8
EPSS
0.2%
top 56.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Python PillowPaloalto Pan-os
Timeline
PublishedMar 19
Latest updateSep 3

Description

An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buffer overflow when decoding crafted YCbCr files because of certain interpretation conflicts with LibTIFF in RGBA mode. NOTE: this issue exists because of an incomplete fix for CVE-2020-35654.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages5 packages

▶NVDpython/pillow< 8.1.1
▶PyPIpython/pillow< 8.1.1
▶Debianpython/pillow< 8.1.1-1+3
▶Ubuntupython/pillow< 3.1.2-0ubuntu1.6+2
▶Palo Altopaloalto/pan-os

🔴Vulnerability Details

5
OSV
Out of bounds write in Pillow↗2021-03-29
▶
GHSA
Out of bounds write in Pillow↗2021-03-29
▶
CVEList
CVE-2021-25289: An issue was discovered in Pillow before 8↗2021-03-19
▶
OSV
CVE-2021-25289: An issue was discovered in Pillow before 8↗2021-03-19
▶
OSV
pillow vulnerabilities↗2021-03-11
▶

📋Vendor Advisories

4
Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS↗2024-02-14
▶
Ubuntu
Pillow vulnerabilities↗2021-03-11
▶
Red Hat
python-pillow: insufficent fix for CVE-2020-35654 due to incorrect error checking in TiffDecode.c↗2021-02-28
▶
Debian
CVE-2021-25289: pillow - An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buff...↗2021
▶

📄Research Papers

1
arXiv
VulnRepairEval: An Exploit-Based Evaluation Framework for Assessing Large Language Model Vulnerability Repair Capabilities↗2025-09-03
▶
CVE-2021-25289 — Out-of-bounds Write in Python Pillow | cvebase