| Name | CVE-2017-7890 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1055-1, DSA-3938-1 |
| Debian Bugs | 869263 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libgd2 (PTS) | bullseye | 2.3.0-2 | fixed |
| bookworm | 2.3.3-9 | fixed | |
| forky, sid, trixie | 2.3.3-13 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libgd2 | source | wheezy | 2.0.36~rc1~dfsg-6.1+deb7u9 | DLA-1055-1 | ||
| libgd2 | source | jessie | 2.1.0-5+deb8u10 | DSA-3938-1 | ||
| libgd2 | source | stretch | 2.2.4-2+deb9u1 | DSA-3938-1 | ||
| libgd2 | source | (unstable) | 2.2.5-1 | 869263 | ||
| php5 | source | (unstable) | (unfixed) | unimportant | ||
| php7.0 | source | (unstable) | 7.0.22-1 | unimportant | ||
| php7.1 | source | (unstable) | 7.1.8-1 | unimportant |
PHP Bug: https://bugs.php.net/bug.php?id=74435
Fixed in 7.1.7, 7.0.21, 5.6.31
https://github.com/libgd/libgd/issues/399
https://github.com/libgd/libgd/commit/c613bc169802bb4b639ee2e15c61b25b80a88424