#VU33154 Buffer overflow in cURL - CVE-2017-7407

Vulnerability identifier: #VU33154

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7407

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
cURL
Client/Desktop applications / Other client software

Vendor: curl.haxx.se

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.

Mitigation
Install update from vendor's website.

Vulnerable software versions

cURL: 7.53.1

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External links
https://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
https://access.redhat.com/errata/RHSA-2018:3558
https://github.com/curl/curl/commit/1890d59905414ab84a35892b2e45833654aa5c13
https://security.gentoo.org/glsa/201709-14

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.