Ubuntu.comUB:CVE-2017-7890CVE-2017-7890
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.298 Low
EPSS
Percentile
96.9%
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.
Bugs
- <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=869263>
- <https://github.com/libgd/libgd/issues/399>
- <https://bugs.php.net/bug.php?id=74435>
Notes
| Author | Note |
|---|---|
| mdeslaur | php uses the system libgd2 |
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
0.298 Low
EPSS
Percentile
96.9%