#VU17721 Input validation error in libsolv - CVE-2018-20534

Vulnerability identifier: #VU17721

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2018-20534

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: SUSE

Description

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

The vulnerability exists due to insufficient validation of user-supplied input processed by the pool_whatprovides function, as defined in the ext/pool.h source code file of the affected software. A remote attacker can trick the victim into opening or executing a file that submits malicious input, trigger an illegal access address condition and cause the affected software to crash, resulting in a DoS condition.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libsolv: 0.6.0 - 0.7.2

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External links
https://github.com/openSUSE/libsolv/pull/291

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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. However, proof of concept for this vulnerability is available.