#VU37109 Use-after-free in lrzip - CVE-2018-11496

Vulnerability identifier: #VU37109

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-11496

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lrzip
Other software / Other software solutions

Vendor: ckolivas (Con Kolivas)

Description

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

In Long Range Zip (aka lrzip) 0.631, there is a use-after-free in read_stream in stream.c, because decompress_file in lrzip.c lacks certain size validation.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lrzip: 0.631

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External links
https://github.com/ckolivas/lrzip/issues/96

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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.