Information disclosure in cURL

Published: 2017-08-10 00:00:00 | Updated: 2017-08-15 15:35:19
Severity Low
Patch available YES
Number of vulnerabilities 3
CVSSv2 1.6 (AV:L/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
1.6 (AV:L/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
3.7 (AV:N/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
CVSSv3 2.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
2.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE ID CVE-2017-1000099
CVE-2017-1000101
CVE-2017-1000100
CWE ID CWE-125
CWE-601
Exploitation vector Network
Public exploit Not available
Vulnerable software libcurl
cURL
Vulnerable software versions libcurl 7.52.0
libcurl 7.52.1
libcurl 7.53.0
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cURL 7.53.0
cURL 7.52.1
cURL 7.52.0
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Vendor URL curl.haxx.se
Advisory type Public

Security Advisory

1) Out-of-bounds read

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The weakness exists due to out-of bounds read. A local attacker can load a specially crafted 'file://' URL to cause the curl application to return data from system memory.

Successful exploitation of the vulnerability results in information disclosure.

Remediation

Update to version 7.55.0.

External links

https://curl.haxx.se/docs/adv_20170809C.html

2) Out-of-bounds read

Description

The vulnerability allows a remote attacker to redirect website visitors to external websites.

The weakness exists due to out-of-bounds read. A local user can supply a URL containing specially crafted numerical range characters to trigger a heap read error and obtain potentially sensitive information from system memory

Successful exploitation of the vulnerability results in information disclosure.

Remediation

Update to version 7.55.0.

External links

https://curl.haxx.se/docs/adv_20170809A.html

3) Open redirect

Description

The vulnerability allows a remote attacker to redirect website visitors to external websites.

The weakness exists due to incorrect validation of redirected URL. A remote attacker can redirect the target user's curl request to a TFTP URL with a long filename to cause the target user's curl application to send portions of system memory.

Successful exploitation of the vulnerability results in information disclosure.

Remediation

Update to version 7.55.0.

External links

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

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