National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-1000257 Detail

Current 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.

Source:  MITRE      Last Modified:  10/31/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-1000257
Original release date:
10/31/2017
Last revised:
12/15/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
9.1 Critical
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H (legend)
Impact Score:
5.2
Exploitability Score:
3.9
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
6.4 MEDIUM
Vector:
(AV:N/AC:L/Au:N/C:P/I:N/A:P) (legend)
Impact Subscore:
4.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://www.debian.org/security/2017/dsa-4007 Third Party Advisory External Source DEBIAN DSA-4007
http://www.securityfocus.com/bid/101519 Third Party Advisory; VDB Entry External Source BID 101519
http://www.securitytracker.com/id/1039644 Third Party Advisory; VDB Entry External Source SECTRACK 1039644
https://access.redhat.com/errata/RHSA-2017:3263 External Source REDHAT RHSA-2017:3263
https://curl.haxx.se/docs/adv_20171023.html Vendor Advisory External Source CONFIRM https://curl.haxx.se/docs/adv_20171023.html
https://security.gentoo.org/glsa/201712-04 External Source GENTOO GLSA-201712-04

Technical Details

Vulnerability Type (View All)

Change History 5 change records found - show changes