An update for lz4 is now available for openEuler-20.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2021-1245 Final 1.0 1.0 2021-06-26 Initial 2021-06-26 2021-06-26 openEuler SA Tool V1.0 2021-06-26 lz4 security update An update for lz4 is now available for openEuler-20.03-LTS-SP1. LZ4 is lossless compression algorithm, providing compression speed > 500 MB/s per core (>0.15 Bytes/cycle). It features an extremely fast decoder, with speed in multiple GB/s per core (~1 Byte/cycle). A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio. Security Fix(es): There s a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.(CVE-2021-3520) An update for lz4 is now available for openEuler-20.03-LTS-SP1. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical lz4 https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1245 https://openeuler.org/en/security/cve/detail.html?id=CVE-2021-3520 https://nvd.nist.gov/vuln/detail/CVE-2021-3520 openEuler-20.03-LTS-SP1 lz4-devel-1.9.2-3.oe1.aarch64.rpm lz4-debuginfo-1.9.2-3.oe1.aarch64.rpm lz4-debugsource-1.9.2-3.oe1.aarch64.rpm lz4-1.9.2-3.oe1.aarch64.rpm lz4-help-1.9.2-3.oe1.noarch.rpm lz4-1.9.2-3.oe1.src.rpm lz4-debugsource-1.9.2-3.oe1.x86_64.rpm lz4-1.9.2-3.oe1.x86_64.rpm lz4-devel-1.9.2-3.oe1.x86_64.rpm lz4-debuginfo-1.9.2-3.oe1.x86_64.rpm There s a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well. 2021-06-26 CVE-2021-3520 openEuler-20.03-LTS-SP1 Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H lz4 security update 2021-06-26 https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1245