01 Record

CVE-2021-34552

Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 3.18% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 87.7% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-07-13 00:00Z5 YR AGO

Last updated

2024-08-04 00:12Z2 YR AGO

Reserved

2021-06-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

d8eb7b0f03513cfe3f5883c80e197458454e4167891e67fb5a9b0c5805f19e7f

05 Affected products

VendorProductVersionsPlatforms

debiandebian_linuxNot specified—

fedoraprojectfedoraNot specified—

pythonpillowNot specified—

redhatenterprise_linuxNot specified—

redhatquayNot specified—

06 References

pillow.readthedocs.iohttps://pillow.readthedocs.io/en/stable/releasenotes/index.html
pillow.readthedocs.iohttps://pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html#buffer-overflow
lists.debian.org[debian-lts-announce] 20210722 [SECURITY] [DLA 2716-1] pillow security updatehttps://lists.debian.org/debian-lts-announce/2021/07/msg00018.htmlmailing-list
lists.fedoraproject.orgFEDORA-2021-bf01a738f3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V6LCG525ARIX6LX5QRYNAWVDD2MD2SV/vendor-advisory
lists.fedoraproject.orgFEDORA-2021-3ec845dc0chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUGBBT63VL7G4JNOEIPDJIOC34ZFBKNJ/vendor-advisory
security.gentoo.orgGLSA-202211-10https://security.gentoo.org/glsa/202211-10vendor-advisory

07 Fixed in

AlmaLinux 8

python3-pillow
Fixed in 5.1.1-16.el8

Arch Linux

python-pillow
Fixed in 8.3.0-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

python3-pillow
Fixed in 5.1.1-16.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

pillow
Fixed in 8.1.2+dfsg-0.3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

pillow
Fixed in 8.1.2+dfsg-0.3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

pillow
Fixed in 8.1.2+dfsg-0.3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.