Title: Weex Log_Flush() Function Remote Format String Vulnerability
Severity: HIGH
Description:
Weex is a non-interactive FTP client that automates maintaining a Web site or an FTP archive by synchronizing a set of local files to a remote server.
Weex is affected by a remote format string vulnerability. This issue arises due to insufficient sanitization of user-supplied data.
Specifically, the vulnerability presents itself in the 'log_flush()' function of the 'log.c' file and is exposed when the application attempts to write an error log entry containing format specifiers. An attacker can exploit this condition by establishing a malicious FTP server and supplying a malformed directory name to the utility upon access to the server.
The issue only arises when the application is executed for the first time or the '-r' option is used to re-build cache files from a remote server. A successful attack can facilitate a crash or arbitrary code execution in the context of the application.
Weex versions 2.6.1 and 2.6.1.5 are reported to be vulnerable.
Affected Products:
- Debian Linux 3.0.0
- Debian Linux 3.0.0 alpha
- Debian Linux 3.0.0 arm
- Debian Linux 3.0.0 hppa
- Debian Linux 3.0.0 ia-32
- Debian Linux 3.0.0 ia-64
- Debian Linux 3.0.0 m68k
- Debian Linux 3.0.0 mips
- Debian Linux 3.0.0 mipsel
- Debian Linux 3.0.0 ppc
- Debian Linux 3.0.0 s/390
- Debian Linux 3.0.0 sparc
- Debian Linux 3.1.0
- Debian Linux 3.1.0 alpha
- Debian Linux 3.1.0 amd64
- Debian Linux 3.1.0 arm
- Debian Linux 3.1.0 hppa
- Debian Linux 3.1.0 ia-32
- Debian Linux 3.1.0 ia-64
- Debian Linux 3.1.0 m68k
- Debian Linux 3.1.0 mips
- Debian Linux 3.1.0 mipsel
- Debian Linux 3.1.0 ppc
- Debian Linux 3.1.0 s/390
- Debian Linux 3.1.0 sparc
- Gentoo Linux
- Weex Weex 2.6.1
- Weex Weex 2.6.1 .5
References:
- Emanuel Haupt <ehaupt@critical.ch>: Problem Report ports/86833 : maintainer-update: ftp/weex - fixing a remote forma
- Weex: Home Page
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