CVE-2017-13089
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 79.9%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
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 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 79.86% probability · 100th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-121, CWE-119
- Affected
- gnu/wget · debian/debian linux
- Source
- cret@cert.org
References
- http://git.savannah.gnu.org/cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea5125770989c215df3fIssue Tracking, Patch, Third Party Advisory
- http://www.debian.org/security/2017/dsa-4008Issue Tracking, Third Party Advisory
- http://www.securityfocus.com/bid/101592Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039661Issue Tracking, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3075
- https://github.com/r1b/CVE-2017-13089Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/201711-06Issue Tracking, Third Party Advisory
- https://www.synology.com/support/security/Synology_SA_17_62_Wget
- https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.htmlIssue Tracking, Patch, Third Party Advisory
- http://git.savannah.gnu.org/cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea5125770989c215df3fIssue Tracking, Patch, Third Party Advisory
- http://www.debian.org/security/2017/dsa-4008Issue Tracking, Third Party Advisory
- http://www.securityfocus.com/bid/101592Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039661Issue Tracking, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3075
- https://github.com/r1b/CVE-2017-13089Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/201711-06Issue Tracking, Third Party Advisory
- https://www.synology.com/support/security/Synology_SA_17_62_Wget
- https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.htmlIssue Tracking, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.