Title: GPicView Multiple Local Security Vulnerabilities
Severity: MODERATE
Description:
GPicView is an open-source image viewer.
GPicView is affected by multiple local security vulnerabilities:
1. The application creates temporary files in an insecure manner because it assumes only one user exists on the computer. '/tmp/rot.jpg' is hardcoded in the 'src/main-win.c' source file for jpeg file saves. Attackers can overwrite this file with malicious data by executing a symbolic-link attack.
2. The application permits data to be overwritten with an arbitrary file. This issue affects GPicView built with the LIBJPEG library. The 'ask_before_save' preference setting is ignored, allowing an attacker to overwrite data with a symlink attack; no confirmation from the user is required.
3. The application permits data to be overwritten because it ignores the 'ask_before_save' and 'auto_save_rotated' preference settings in the 'on_rotate_clockwise()' and 'on_rotate_counterclockwise()' functions in the 'src/main-win.c' source file. This can allow an attacker to overwrite data with a symlink attack; no confirmation from the user is required.
Attackers may leverage these issues to overwrite arbitrary files with the privileges of the user running the application.
GPicView 0.1.9 is vulnerable; other versions may also be affected.
Affected Products:
- Debian Linux 4.0
- Debian Linux 4.0 alpha
- Debian Linux 4.0 amd64
- Debian Linux 4.0 arm
- Debian Linux 4.0 hppa
- Debian Linux 4.0 ia-32
- Debian Linux 4.0 ia-64
- Debian Linux 4.0 m68k
- Debian Linux 4.0 mips
- Debian Linux 4.0 mipsel
- Debian Linux 4.0 powerpc
- Debian Linux 4.0 s/390
- Debian Linux 4.0 sparc
- GPicView GPicView 0.1.9
References:
- Debian: #495968 [gpicview] security RC bugs
- GPicView: GPicView Homepage
- Jeremy C. Reed: [ 2019481 ] gpicview unsafe /tmp usage
- Jeremy C. Reed: [ 2019485 ] gpicview ask_before_save is ignored with LIBJPEG You may monitor thi
- Jeremy C. Reed: [ 2019492 ] gpicview ask_before_save is ignored if auto_save_rotated
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