Bug 1710609 (CVE-2019-5435) - CVE-2019-5435 curl: Integer overflows in curl_url_set() function
Summary: CVE-2019-5435 curl: Integer overflows in curl_url_set() function
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-5435
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1712839
Blocks: 1710621
TreeView+ depends on / blocked
 
Reported: 2019-05-15 20:58 UTC by Pedro Sampaio
Modified: 2021-02-16 21:56 UTC (History)
23 users (show)

Fixed In Version: curl 7.65.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-05-20 05:51:01 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4383 0 None None None 2020-10-28 15:49:39 UTC
Red Hat Product Errata RHSA-2020:4384 0 None None None 2020-10-28 16:00:48 UTC

Description Pedro Sampaio 2019-05-15 20:58:23 UTC 
libcurl contains two integer overflows in the `curl_url_set()` function that
if triggered, can lead to a too small buffer allocation and a subsequent heap
buffer overflow.

Upstream patch:

https://github.com/curl/curl/commit/5fc28510a4664f4

References:

https://curl.haxx.se/docs/CVE-2019-5435.html
Comment 2 Huzaifa S. Sidhpurwala 2019-05-20 05:45:25 UTC 
This flaw only manifests itself on 32bit arches. 

There are two entry points to this issue, on 32 bit architectures.

By asking libcurl to parse a string, passing in a string longer than 2GB to this API: `curl_url_set(uh, CURLUPART_URL, "string", 0);` triggers the bug.

Asking libcurl to update a URL with a new string, and URL encoded it in the process, by passing in a string longer than 1.33GB to this API:
`curl_url_set(uh, CURLUPART_*, "string", CURLU_URLENCODE);` triggers the bug.

This bug was introduced in August 2018 in
[commit fb30ac5a2d](https://github.com/curl/curl/commit/fb30ac5a2d63773c52).
Comment 3 Huzaifa S. Sidhpurwala 2019-05-20 08:42:35 UTC 
Acknowledgments:

Name: the Curl project
Upstream: Wenchao Li
Comment 4 Dhananjay Arunesh 2019-05-22 11:01:16 UTC 
Created curl tracking bugs for this issue:

Affects: fedora-all [bug 1712839]
Comment 7 errata-xmlrpc 2020-10-28 15:49:38 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services

Via RHSA-2020:4383 https://access.redhat.com/errata/RHSA-2020:4383
Comment 8 errata-xmlrpc 2020-10-28 16:00:45 UTC 
This issue has been addressed in the following products:

  JBoss Core Services on RHEL 7
  JBoss Core Services on RHEL 6

Via RHSA-2020:4384 https://access.redhat.com/errata/RHSA-2020:4384
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