Vulnerability identifier: #VU64983

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11692

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
yaml-cpp
Other software / Other software solutions

Vendor: jbeder (Jesse Beder)

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in the Token& Scanner::peek() function in scanner.cpp in yaml-cpp. A remote attacker can send a specially crafted !2 string and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

yaml-cpp: 0.5.0 - 0.5.3

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External links
http://github.com/jbeder/yaml-cpp/issues/519
http://security.gentoo.org/glsa/202007-14

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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.