PT-2026-42055 · Rsync+2 · Rsync+2
CVSS v3.1
3.7
Low
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
Name of the Vulnerable Software and Affected Versions
rsync versions prior to 3.4.3
Description
An off-by-one out-of-bounds stack write exists in the
establish proxy connection() function within socket.c. Network attackers can corrupt stack memory by sending a malformed HTTP proxy response. This occurs when the RSYNC PROXY environment variable is set and the attacker, by controlling the proxy server or positioning themselves between the client and proxy, sends a response line of 1023 or more bytes without a newline terminator, resulting in a null byte being written to an out-of-bounds stack address.Recommendations
Update to version 3.4.3 or later.
As a temporary workaround, avoid setting the
RSYNC PROXY environment variable to minimize the risk of exploitation.Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Ubuntu
Rsync