Python
CVE-2020-5312
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1Blast Radius
ecosystem impact- 143 pypi packages depend on pillow (114 direct, 30 indirect)
Ecosystem-wide dependent count for version 6.2.2.
DescriptionNVD
libImaging/PcxDecode.c in Pillow before 6.2.2 has a PCX P mode buffer overflow.
AnalysisAI
libImaging/PcxDecode.c in Pillow before 6.2.2 has a PCX P mode buffer overflow. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Buffer Copy without Size Check vulnerability could allow attackers to overflow a buffer to corrupt adjacent memory.
Technical ContextAI
This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. libImaging/PcxDecode.c in Pillow before 6.2.2 has a PCX P mode buffer overflow. Affected products include: Python Pillow, Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora. Version information: before 6.2.2.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.
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Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today