CVE-2017-1000257

CVE Details

Release Date:

2017-10-23

Description

An IMAP FETCH response line indicates the size of the returned data,in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.

See more information about CVE-2017-1000257 from MITRE CVE dictionary and NIST NVD

CVSS v2.0 metrics

NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.

Base Score:	6.4	Base Metrics:	AV:N/AC:L/Au:N/C:P/I:N/A:P
Access Vector:	Network	Attack Complexity:	Low
Authentication:	None required	Confidentiality Impact:	Partial
Integrity Impact:	None	Availability Impact:	Partial

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (curl)	ELSA-2017-3263	2017-11-27

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team