vulnwire
8.8high

CVE-2017-13089in critical feed

GNU Wget: stack overflow in HTTP protocol handling

Published 9 y ago · modified 4 mo ago · JSON

CVSS
8.8
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
79.9%
percentile 100%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

79.86% probability of exploitation in the next 30 days, higher than 100% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.08.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA3.08.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD3.08.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD2.09.3AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • GNU Project Wget

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

  • viestintavirasto.fi /en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.html · x_refsource_MISC, x_transferred
  • security.gentoo.org /glsa/201711-06 · vendor-advisory, x_refsource_GENTOO, x_transferred
  • debian.org /security/2017/dsa-4008 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • synology.com /support/security/Synology_SA_17_62_Wget · x_refsource_CONFIRM, x_transferred
  • git.savannah.gnu.org /cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea5125770989c215df3f · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/101592 · vdb-entry, x_refsource_BID, x_transferred
  • github.com /r1b/CVE-2017-13089 · x_refsource_MISC, x_transferred
  • securitytracker.com /id/1039661 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • access.redhat.com /errata/RHSA-2017:3075 · vendor-advisory, x_refsource_REDHAT, x_transferred

Sources

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