Pillow up to 8.1.x FLI Data FliDecode infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Pillow up to 8.1.x and classified as problematic. Impacted is the function FliDecode of the component FLI Data Handler. Executing a manipulation can lead to infinite loop. This vulnerability is handled as CVE-2021-28676. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Pillow up to 8.1.x. It has been declared as problematic. This vulnerability affects the function FliDecode of the component FLI Data Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability.

The weakness was released 06/02/2021. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-28676. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 236661 (Alibaba Cloud Linux 3 : 0012: python-pillow (ALINUX3-SA-2022:0012)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.2.0 eliminates this vulnerability. The upgrade is hosted for download at pillow.readthedocs.io.

The vulnerability is also documented in the databases at Tenable (236661) and CERT Bund (WID-SEC-2022-1835). Once again VulDB remains the best source for vulnerability data.

Affected

  • Amazon Linux 2
  • Ubuntu Linux
  • SUSE Linux
  • Red Hat Enterprise Linux
  • Open Source Python

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236661
Nessus Name: Alibaba Cloud Linux 3 : 0012: python-pillow (ALINUX3-SA-2022:0012)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Pillow 8.2.0

Timelineinfo

03/18/2021 🔍
06/02/2021 +75 days 🔍
06/02/2021 +0 days 🔍
03/31/2026 +1763 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2021-28676 (🔍)
GCVE (CVE): GCVE-0-2021-28676
GCVE (VulDB): GCVE-100-176236
CERT Bund: WID-SEC-2022-1835 - Red Hat Enterprise Linux (python-pillow): Mehrere Schwachstellen

Entryinfo

Created: 06/02/2021 22:20
Updated: 03/31/2026 21:34
Changes: 06/02/2021 22:20 (39), 06/05/2021 14:23 (5), 05/18/2025 20:08 (16), 03/31/2026 21:34 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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