Security Bulletin: Pillow versions have a Denial of Service vulnerability due to uncontrolled memory allocation in ImageFont's

Summary

An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of memory. This occurs for truetype in ImageFont when textlength in an ImageDraw instance operates on a long text argument. Pillow through 10.1.0 allows PIL.ImageMath.eval Arbitrary Code Execution via the environment parameter, a different vulnerability than CVE-2022-22817 (which was about the expression parameter).

Vulnerability Details

CVEID:CVE-2023-44271
**DESCRIPTION:**Pillow is vulnerable to a denial of service, caused by a flaw with uncontrollably allocates memory to process a given task. By sending a specially crafted request, a remote attacker could exploit this vulnerability to cause service to crash.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/270517 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2023-50447
**DESCRIPTION:**Pillow could allow a remote attacker to execute arbitrary code on the system, caused by improper neutralization of user supplied-input by the PIL.ImageMath.eval function. By sending a specially crafted request using keys that leverage the environment parameter, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/280022 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Remediation/Fixes

Workarounds and Mitigations

None