#VU8917 Buffer over-read in libcurl - CVE-2017-1000257

Vulnerability identifier: #VU8917

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-1000257

CWE-ID: CWE-126

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libcurl
Universal components / Libraries / Libraries used by multiple products

Vendor: curl.haxx.se

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The weakness exists due to buffer overread in the IMAP handle. A remote attacker can return a specially crafted IMAP FETCH response, obtain potentially sensitive information from memory on the target system or cause the target application using libcurl to crash.

Mitigation
Update to version 7.56.1.

Vulnerable software versions

libcurl: 7.20.1 - 7.56.0

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External links
https://curl.haxx.se/docs/adv_20171023.html

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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.