An update for rsync is now available for openEuler-20.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-2550 Final 1.0 1.0 2026-06-05 Initial 2026-06-05 2026-06-05 openEuler SA Tool V1.0 2026-06-05 rsync security update An update for rsync is now available for openEuler-20.03-LTS-SP4 Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand. Security Fix(es): Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.(CVE-2026-43618) Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client.(CVE-2026-43620) Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.(CVE-2026-45232) An update for rsync is now available for openEuler-20.03-LTS-SP4. openEuler Security has rated this update as having a security impact of high. 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. High rsync https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2550 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-43618 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-43620 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-45232 https://nvd.nist.gov/vuln/detail/CVE-2026-43618 https://nvd.nist.gov/vuln/detail/CVE-2026-43620 https://nvd.nist.gov/vuln/detail/CVE-2026-45232 openEuler-20.03-LTS-SP4 rsync-3.1.3-14.oe2003sp4.aarch64.rpm rsync-debuginfo-3.1.3-14.oe2003sp4.aarch64.rpm rsync-debugsource-3.1.3-14.oe2003sp4.aarch64.rpm rsync-3.1.3-14.oe2003sp4.src.rpm rsync-3.1.3-14.oe2003sp4.x86_64.rpm rsync-debuginfo-3.1.3-14.oe2003sp4.x86_64.rpm rsync-debugsource-3.1.3-14.oe2003sp4.x86_64.rpm rsync-help-3.1.3-14.oe2003sp4.noarch.rpm Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation. 2026-06-05 CVE-2026-43618 openEuler-20.03-LTS-SP4 High 8.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H rsync security update 2026-06-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2550 Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client. 2026-06-05 CVE-2026-43620 openEuler-20.03-LTS-SP4 Medium 5.5 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H rsync security update 2026-06-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2550 Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set. 2026-06-05 CVE-2026-45232 openEuler-20.03-LTS-SP4 Low 3.7 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L rsync security update 2026-06-05 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2550