National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

    Vulnerabilities Detail

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
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.1 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H (V3 legend)
Impact Score: 5.2
Exploitability Score: 3.9

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 v2.0 Severity and Metrics:

Base Score: 6.4 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:P) (V2 legend)
Impact Subscore: 4.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
7.20.0		Up to (including)
7.56.0

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-1000257
NVD Published Date:
10/31/2017
NVD Last Modified:
11/13/2018