CVE-2017-1000257
Apache Libcurl Null Pointer Dereference
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.
INFO
Published Date :
Oct. 31, 2017, 9:29 p.m.
Last Modified :
Nov. 13, 2018, 11:29 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2017-1000257 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2017-1000257
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-1000257.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
PoCs discovered through fuzzing which resulted in a CVE assignment.
fuzzing infosec cve security testcase poc
Prolog
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-1000257 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-1000257 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 13, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:3558 [No Types Assigned] -
CVE Modified by [email protected]
Aug. 17, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:2486 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 16, 2017
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/201712-04 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 02, 2017
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2017:3263 [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 27, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Changed Reference Type http://www.securitytracker.com/id/1039644 No Types Assigned http://www.securitytracker.com/id/1039644 Third Party Advisory, VDB Entry Changed Reference Type https://curl.haxx.se/docs/adv_20171023.html No Types Assigned https://curl.haxx.se/docs/adv_20171023.html Vendor Advisory Changed Reference Type http://www.debian.org/security/2017/dsa-4007 No Types Assigned http://www.debian.org/security/2017/dsa-4007 Third Party Advisory Changed Reference Type http://www.securityfocus.com/bid/101519 No Types Assigned http://www.securityfocus.com/bid/101519 Third Party Advisory, VDB Entry Added CWE CWE-119 Added CPE Configuration OR *cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.20.0 up to (including) 7.56.0 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 06, 2017
Action Type Old Value New Value Added Reference http://www.debian.org/security/2017/dsa-4007 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 02, 2017
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1039644 [No Types Assigned] Added Reference http://www.securityfocus.com/bid/101519 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-1000257 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-1000257
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2.19 }} -0.40%
score
0.87819
percentile