Bug 1005642 (CVE-2016-8621)

Summary: VUL-0: CVE-2016-8621: curl: curl_getdate read out of bounds
Product: [Novell Products] SUSE Security Incidents Reporter: Johannes Segitz <jsegitz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED FIXED QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: astieger, krahmer, vcizek
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
Whiteboard: CVSSv2:SUSE:CVE-2016-8621:6.8:(AV:N/AC:M/Au:N/C:P/I:P/A:P) CVSSv2:RedHat:CVE-2016-8621:4.3:(AV:N/AC:M/Au:N/C:P/I:N/A:N) maint:released:sle10-sp3:63188 CVSSv3:RedHat:CVE-2016-8621:5.3:(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Found By: --- Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description Johannes Segitz 2016-10-19 14:40:28 UTC
curl_getdate read out of bounds
===============================

Project cURL Security Advisory, November 2, 2016 -
[Permalink](https://curl.haxx.se/docs/adv_20161102G.html)

VULNERABILITY
-------------

The `curl_getdate` converts a given date string into a numerical timestamp and
it supports a range of different formats and possibilites to express a date
and time. The underlying date parsing function is also used internally when
parsing for example HTTP cookies (possibly received from remote servers) and
it can be used when doing conditional HTTP requests.

The date parser function uses the libc sscanf() function at two places, with
the parsing strings "%02d:%02d" and ""%02d:%02d:%02d". The intent being that
it would parse either a string with HH:MM (two digits colon two digits) or
HH:MM:SS (two digits colon two digits colon two digits). If instead the piece
of time that was sent in had the final digit cut off, thus ending with a
single-digit, the date parser code would advance its read pointer one byte too
much and end up reading out of bounds.

We are not aware of any exploit of this flaw.

INFO
----

The Common Vulnerabilities and Exposures (CVE) project has assigned the name
CVE-2016-XXXX to this issue.

AFFECTED VERSIONS
-----------------

This flaw exists in the following curl versions.

- Affected versions: curl 7.12.2 to and including 7.50.3
- Not affected versions: curl < 7.12.2 and curl >= 7.51.0

libcurl is used by many applications, but not always advertised as such!

THE SOLUTION
------------

In version 7.51.0, the parser function is fixed.

A [patch for CVE-2016-XXXX](https://curl.haxx.se/s3c/G.patch) is available.

RECOMMENDATIONS
---------------

We suggest you take one of the following actions immediately, in order of
preference:

  A - Upgrade curl and libcurl to version 7.51.0

  B - Apply the patch to your version and rebuild

TIME LINE
---------

It was first reported to the curl project on October 3 by Lu§t Nguy­n.

We contacted distros@openwall on October 19.

curl 7.51.0 was released on November 2 2016, coordinated with the publication
of this advisory.

CREDITS
-------

Thanks to Lu§t Nguy­n.
Comment 1 Johannes Segitz 2016-10-19 14:40:37 UTC
From: Daniel Stenberg
We intend to publish the advisories, the patches and announce the new
release (7.51.0) with all of these problems fixed on November 2nd.

CRD: 2016-11-02
Comment 2 Swamp Workflow Management 2016-10-19 22:04:47 UTC
bugbot adjusting priority
Comment 8 Swamp Workflow Management 2016-11-02 15:08:57 UTC
SUSE-SU-2016:2699-1: An update that fixes 11 vulnerabilities is now available.

Category: security (important)
Bug References: 1005633,1005634,1005635,1005637,1005638,1005640,1005642,1005643,1005645,1005646,998760
CVE References: CVE-2016-7167,CVE-2016-8615,CVE-2016-8616,CVE-2016-8617,CVE-2016-8618,CVE-2016-8619,CVE-2016-8620,CVE-2016-8621,CVE-2016-8622,CVE-2016-8623,CVE-2016-8624
Sources used:
SUSE Linux Enterprise Software Development Kit 12-SP1 (src):    curl-7.37.0-31.1
SUSE Linux Enterprise Server 12-SP1 (src):    curl-7.37.0-31.1
SUSE Linux Enterprise Desktop 12-SP1 (src):    curl-7.37.0-31.1
Comment 9 Swamp Workflow Management 2016-11-02 15:10:51 UTC
SUSE-SU-2016:2700-1: An update that fixes 13 vulnerabilities is now available.

Category: security (important)
Bug References: 1005633,1005634,1005635,1005637,1005638,1005642,1005645,1005646,997420,998760
CVE References: CVE-2016-5420,CVE-2016-7141,CVE-2016-7167,CVE-2016-8615,CVE-2016-8616,CVE-2016-8617,CVE-2016-8618,CVE-2016-8619,CVE-2016-8620,CVE-2016-8621,CVE-2016-8622,CVE-2016-8623,CVE-2016-8624
Sources used:
SUSE Studio Onsite 1.3 (src):    curl-7.19.7-1.20.47.2
Comment 10 Swamp Workflow Management 2016-11-03 14:09:39 UTC
SUSE-SU-2016:2714-1: An update that fixes 11 vulnerabilities is now available.

Category: security (important)
Bug References: 1005633,1005634,1005635,1005637,1005638,1005642,1005645,1005646,998760
CVE References: CVE-2016-7167,CVE-2016-8615,CVE-2016-8616,CVE-2016-8617,CVE-2016-8618,CVE-2016-8619,CVE-2016-8620,CVE-2016-8621,CVE-2016-8622,CVE-2016-8623,CVE-2016-8624
Sources used:
SUSE Linux Enterprise Software Development Kit 11-SP4 (src):    curl-7.19.7-1.64.1
SUSE Linux Enterprise Server 11-SP4 (src):    curl-7.19.7-1.64.1
SUSE Linux Enterprise Server 11-SECURITY (src):    curl-openssl1-7.19.7-1.64.1
SUSE Linux Enterprise Debuginfo 11-SP4 (src):    curl-7.19.7-1.64.1
Comment 11 Swamp Workflow Management 2016-11-04 10:06:42 UTC
An update workflow for this issue was started.
This issue was rated as moderate.
Please submit fixed packages until 2016-11-18.
When done, reassign the bug to security-team@suse.de.
https://swamp.suse.de/webswamp/wf/63187
Comment 12 Swamp Workflow Management 2016-11-10 16:07:47 UTC
openSUSE-SU-2016:2768-1: An update that fixes 11 vulnerabilities is now available.

Category: security (important)
Bug References: 1005633,1005634,1005635,1005637,1005638,1005640,1005642,1005643,1005645,1005646,998760
CVE References: CVE-2016-7167,CVE-2016-8615,CVE-2016-8616,CVE-2016-8617,CVE-2016-8618,CVE-2016-8619,CVE-2016-8620,CVE-2016-8621,CVE-2016-8622,CVE-2016-8623,CVE-2016-8624
Sources used:
openSUSE Leap 42.1 (src):    curl-7.37.0-16.1
Comment 13 Sebastian Krahmer 2016-11-14 12:59:05 UTC
released