Information disclosure in cURL
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2017-1000099 CVE-2017-1000101 CVE-2017-1000100 |
| CWE-ID | CWE-125 CWE-601 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
libcurl Universal components / Libraries / Libraries used by multiple products cURL Client/Desktop applications / Other client software |
| Vendor | curl.haxx.se |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU7882
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-1000099
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
Update to version 7.55.0.
libcurl: 7.10.6 - 7.54.0
cURL: 7.1 - 7.53.0
External linkshttp://curl.haxx.se/docs/adv_20170809C.html
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Out-of-bounds read
EUVDB-ID: #VU7885
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-1000101
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
Update to version 7.55.0.
cURL: 7.34.0 - 7.53.0
External linkshttp://curl.haxx.se/docs/adv_20170809A.html
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Open redirect
EUVDB-ID: #VU7884
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/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-2017-1000100
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe 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.
Update to version 7.55.0.
libcurl: 7.12.1 - 7.54.0
cURL: 7.15 - 7.53.0
External linkshttp://curl.haxx.se/docs/adv_20170809B.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
