#VU39068 Out-of-bounds read in lrzip - CVE-2017-8845

Vulnerability identifier: #VU39068

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-2017-8845

CWE-ID: CWE-125

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.

The lzo1x_decompress function in lzo1x_d.ch in LZO 2.08, as used in lrzip 0.631, allows remote attackers to cause a denial of service (invalid memory read and application crash) via a crafted archive.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lrzip: 0.631

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External links
https://blogs.gentoo.org/ago/2017/05/07/lrzip-invalid-memory-read-in-lzo_decompress_buf-stream-c/
https://github.com/ckolivas/lrzip/issues/68
https://security.gentoo.org/glsa/202005-01

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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.