Unauthorized access to screen In libgd2
Description
The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Component | Affected version | Patched versions |
|---|---|---|---|
 alpine v3.5 | 2.2.5-r0 | ||
 debian 13 | 2.2.5-1 | ||
alpine v3.4 | 2.2.5-r0 | ||
debian 12 | 2.2.5-1 | ||
alpine v3.6 | 2.2.5-r0 | ||
debian 14 | 2.2.5-1 | ||
 rpm rhel5 | - | - | |
rpm rhel6 | - | - | |
rpm rhel7 | 0:5.4.16-43.el7_4.1 | ||
rpm rhel5 | - | - |
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Aliases
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
References
1. 2.