#VU69295 Out-of-bounds read in lapack - CVE-2021-4048

Vulnerability identifier: #VU69295

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-4048

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lapack
Other software / Other software solutions

Vendor: www.netlib.org

Description

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

The vulnerability exists due to a boundary condition within the CLARRV, DLARRV, SLARRV, and ZLARRV functions in lapack. A remote attacker can pass specially crafted data to the application, trigger an out-of-bounds read error and crash the affected application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lapack: 3.6.0 - 3.9.1

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External links
https://github.com/JuliaLang/julia/issues/42415
https://github.com/xianyi/OpenBLAS/commit/337b65133df174796794871b3988cd03426e6d41
https://github.com/xianyi/OpenBLAS/commit/2be5ee3cca97a597f2ee2118808a2d5eacea050c
https://github.com/xianyi/OpenBLAS/commit/ddb0ff5353637bb5f5ad060c9620e334c143e3d7
https://github.com/Reference-LAPACK/lapack/commit/38f3eeee3108b18158409ca2a100e6fe03754781
https://github.com/Reference-LAPACK/lapack/pull/625
https://github.com/xianyi/OpenBLAS/commit/fe497efa0510466fd93578aaf9da1ad8ed4edbe7
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6QFEVOCUG2UXMVMFMTU4ONJVDEHY2LW2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DROZM4M2QRKSD6FBO4BHSV2QMIRJQPHT/

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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.