Bug 1478310 – CVE-2017-1000100 curl: TFTP sends more than buffer size

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Bug 1478310 - (CVE-2017-1000100) CVE-2017-1000100 curl: TFTP sends more than buffer size

Summary:	CVE-2017-1000100 curl: TFTP sends more than buffer size

Status:	NEW

Aliases:	CVE-2017-1000100

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20170809,reported=2...
Keywords:	Security

Depends On:	1479668 1479669 1479670
Blocks:	1478321
	Show dependency tree / graph

Reported:	2017-08-04 05:27 EDT by Adam Mariš
Modified:	2018-07-18 11:28 EDT (History)
CC List:	17 users (show)

See Also:
Fixed In Version:	curl 7.55.0
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Upstream patch (1.72 KB, patch) 2017-08-04 05:45 EDT, Adam Mariš	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Adam Mariš 2017-08-04 05:27:54 EDT

When doing an TFTP upload and curl/libcurl is given a URL that contains a very
long file name (longer than about 515 bytes), the file name is truncated to
fit within the buffer boundaries, but the buffer size is still wrongly updated
to use the untruncated length. This too large value is then used in the
`send()` call, making curl attempt to send more data than what is actually put
into the buffer. The `send()` function will then read beyond the end of the
heap based buffer.

Affected versions: libcurl 7.15.0 to and including 7.54.1

Comment 1 Adam Mariš 2017-08-04 05:28:05 EDT

Acknowledgments:

Name: the Curl project
Upstream: Even Rouault

Comment 3 Adam Mariš 2017-08-04 05:45 EDT

Created attachment 1308973 [details]
Upstream patch

Comment 4 Doran Moppert 2017-08-06 23:45:50 EDT

Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Comment 5 Andrej Nemec 2017-08-09 02:22:48 EDT

External References:

https://curl.haxx.se/docs/adv_20170809B.html

Comment 6 Andrej Nemec 2017-08-09 02:31:37 EDT

Created curl tracking bugs for this issue:

Affects: fedora-all [bug 1479670]


Created mingw-curl tracking bugs for this issue:

Affects: epel-7 [bug 1479668]
Affects: fedora-all [bug 1479669]

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