CVE-2017-13089
wget - security update
Description
The http.c:skip_short_body() function is called in some circumstances, such as when processing redirects. When the response is sent chunked in wget before 1.19.2, the chunk parser uses strtol() to read each chunk's length, but doesn't check that the chunk length is a non-negative number. The code then tries to skip the chunk in pieces of 512 bytes by using the MIN() macro, but ends up passing the negative chunk length to connect.c:fd_read(). As fd_read() takes an int argument, the high 32 bits of the chunk length are discarded, leaving fd_read() with a completely attacker controlled length argument.
How to fix CVE-2017-13089
To remediate CVE-2017-13089, upgrade the affected package to a fixed version below.
- —upgrade to 1.18-r2 or later
- —upgrade to 1.19.2-1 or later
- —upgrade to 1.13.4-3+deb7u5 or later
- —upgrade to 1.16-1+deb8u4 or later
Is CVE-2017-13089 being exploited?
Likely — EPSS is 74.0%, placing CVE-2017-13089 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (4)
- from 0, < 1.18-r2
- from 0, < 1.19.2-1
- from 0, < 1.13.4-3+deb7u5
- from 0, < 1.16-1+deb8u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |