#VU22494 Heap-based buffer overflow in LZ4 - CVE-2019-17543

Vulnerability identifier: #VU22494

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-17543

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LZ4
Client/Desktop applications / Software for archiving

Vendor: LZ4

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the LZ4_write32 when performing archiving operation with LZ4_compress_fast. A remote attacker can pass specially crafted input to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LZ4: 1.7.3 - 1.9.1

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External links
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941
https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2
https://github.com/lz4/lz4/issues/801
https://github.com/lz4/lz4/pull/756
https://github.com/lz4/lz4/pull/760
https://lists.apache.org/thread.html/25015588b770d67470b7ba7ea49a305d6735dd7f00eabe7d50ec1e17@%3Cissues.arrow.apache.org%3E
https://lists.apache.org/thread.html/793012683dc0fa6819b7c2560e6cf990811014c40c7d75412099c357@%3Cissues.arrow.apache.org%3E
https://lists.apache.org/thread.html/9ff0606d16be2ab6a81619e1c9e23c3e251756638e36272c8c8b7fa3@%3Cissues.arrow.apache.org%3E
https://lists.apache.org/thread.html/f0038c4fab2ee25aee849ebeff6b33b3aa89e07ccfb06b5c87b36316@%3Cissues.arrow.apache.org%3E
https://lists.apache.org/thread.html/f506bc371d4a068d5d84d7361293568f61167d3a1c3e91f0def2d7d3@%3Cdev.arrow.apache.org%3E

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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.