Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Wget | <= 1.19.1 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://git.savannah.gnu.org/cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea51257Issue TrackingPatchThird Party Advisory
- http://www.debian.org/security/2017/dsa-4008Issue TrackingThird Party Advisory
- http://www.securityfocus.com/bid/101592Issue TrackingThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039661Issue TrackingThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:3075
- https://github.com/r1b/CVE-2017-13089Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/201711-06Issue TrackingThird Party Advisory
- https://www.synology.com/support/security/Synology_SA_17_62_Wget
- https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvIssue TrackingPatchThird Party Advisory
- http://git.savannah.gnu.org/cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea51257Issue TrackingPatchThird Party Advisory
- http://www.debian.org/security/2017/dsa-4008Issue TrackingThird Party Advisory
- http://www.securityfocus.com/bid/101592Issue TrackingThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039661Issue TrackingThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:3075
- https://github.com/r1b/CVE-2017-13089Issue TrackingThird Party Advisory
FAQ
What is CVE-2017-13089?
CVE-2017-13089 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 rea...
How severe is CVE-2017-13089?
CVE-2017-13089 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-13089?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Wget, Debian Debian Linux.