CVE-2017-1000100

Impact:
Low
Public Date:
2017-08-09
CWE:
CWE-125
Bugzilla:
1478310: CVE-2017-1000100 curl: TFTP sends more than buffer size

The MITRE CVE dictionary describes this issue as:

When doing a TFTP transfer 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 sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.

Find out more about CVE-2017-1000100 from the MITRE CVE dictionary dictionary and NIST NVD.

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/.

CVSS v3 metrics

CVSS3 Base Score 4.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact None
Availability Impact Low

Red Hat Security Errata

Platform Errata Release Date
Red Hat Software Collections for Red Hat Enterprise Linux 6 (httpd24-curl) RHSA-2018:3558 2018-11-13
Red Hat Software Collections for Red Hat Enterprise Linux 7 (httpd24-curl) RHSA-2018:3558 2018-11-13

Affected Packages State

Platform Package State
Red Hat JBoss Web Server 3.0 curl Will not fix
Red Hat Enterprise Linux 7 curl Will not fix
Red Hat Enterprise Linux 6 curl Will not fix
Red Hat Enterprise Linux 5 curl Will not fix
Red Hat Ceph Storage 2 curl Will not fix
RHEV Manager 3 mingw-virt-viewer Will not fix
.NET Core 2.0 on Red Hat Enterprise Linux rh-dotnet20-curl Affected
.NET Core 2.0 on Red Hat Enterprise Linux rh-dotnet21-curl Affected
.NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore10-curl Affected
.NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore11-curl Affected

Acknowledgements

Red Hat would like to thank the Curl project for reporting this issue. Upstream acknowledges Even Rouault as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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