| Name | CVE-2018-20483 |
| Description | set_file_metadata in xattr.c in GNU Wget before 1.20.1 stores a file's origin URL in the user.xdg.origin.url metadata attribute of the extended attributes of the downloaded file, which allows local users to obtain sensitive information (e.g., credentials contained in the URL) by reading this attribute, as demonstrated by getfattr. This also applies to Referer information in the user.xdg.referrer.url metadata attribute. According to 2016-07-22 in the Wget ChangeLog, user.xdg.origin.url was partially based on the behavior of fwrite_xattr in tool_xattr.c in curl. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 917375 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| wget (PTS) | jessie, jessie (lts) | 1.16-1+deb8u7 | fixed |
| stretch (security), stretch (lts), stretch | 1.18-5+deb9u3 | fixed | |
| buster | 1.20.1-1.1 | fixed | |
| bullseye | 1.21-1+deb11u1 | fixed | |
| bookworm | 1.21.3-1 | fixed | |
| trixie | 1.21.4-1 | fixed | |
| sid | 1.24.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| wget | source | wheezy | (not affected) | |||
| wget | source | jessie | (not affected) | |||
| wget | source | stretch | (not affected) | |||
| wget | source | (unstable) | 1.20.1-1 | 917375 |
[stretch] - wget <not-affected> (Vulnerable code introduced in 1.19)
[jessie] - wget <not-affected> (Vulnerable code introduced in 1.19)
https://twitter.com/marcan42/status/1077676739877232640
Fixed by: https://git.savannah.gnu.org/cgit/wget.git/commit/?id=3cdfb594cf75f11cdbb9702ac5e856c332ccacfa
Don't use extended attributes by default: https://git.savannah.gnu.org/cgit/wget.git/commit/?id=c125d24762962d91050d925fbbd9e6f30b2302f8
Introduced by: https://git.savannah.gnu.org/cgit/wget.git/commit/?id=a933bdd31eee9c956a3b5cc142f004ef1fa94cb3 (v1.19)
[wheezy] - wget <not-affected> (vulnerable code was introduced later)