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CVE-2017-1000257 Detail

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.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.debian.org/security/2017/dsa-4007 CVE, MITRE Third Party Advisory 
http://www.securityfocus.com/bid/101519 CVE, MITRE Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039644 CVE, MITRE Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2017:3263 CVE, MITRE
https://access.redhat.com/errata/RHSA-2018:2486 CVE, MITRE
https://access.redhat.com/errata/RHSA-2018:3558 CVE, MITRE
https://curl.haxx.se/docs/adv_20171023.html CVE, MITRE Vendor Advisory 
https://security.gentoo.org/glsa/201712-04 CVE, MITRE

Weakness Enumeration

CWE-ID CWE Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-1000257
NVD Published Date:
10/31/2017
NVD Last Modified:
04/19/2025
Source:
MITRE