socket.recvfrom_into() overflow

socket.recvfrom_into() fails to check that the supplied buffer object is big enough for the requested read and so will happily write off the end.

Dates:

• Disclosure date: 2014-01-14 (Python issue bpo-20246 reported)

Fixed In

• Python 2.7.7 (2014-05-31) fixed by commit 28cf368 (branch 2.7) (2014-01-14)
• Python 3.2.6 (2014-10-12) fixed by commit fbf648e (branch 3.3) (2014-01-14)
• Python 3.3.4 (2014-02-09) fixed by commit fbf648e (branch 3.3) (2014-01-14)
• Python 3.4.0 (2014-03-16) fixed by commit fbf648e (branch 3.3) (2014-01-14)

Python issue

buffer overflow in socket.recvfrom_into.

• Python issue: bpo-20246
• Creation date: 2014-01-14
• Reporter: Ryan Smith-Roberts

CVE-2014-1912

Buffer overflow in the socket.recvfrom_into function in Modules/socketmodule.c in Python 2.5 before 2.7.7, 3.x before 3.3.4, and 3.4.x before 3.4rc1 allows remote attackers to execute arbitrary code via a crafted string.

• CVE ID: CVE-2014-1912
• Published: 2014-03-01
• CVSS Score: 7.5

Timeline

Timeline using the disclosure date 2014-01-14 as reference:

• 2014-01-14: Python issue bpo-20246 reported by Ryan Smith-Roberts
• 2014-01-14: commit 28cf368 (branch 2.7)
• 2014-01-14: commit fbf648e (branch 3.3)
• 2014-02-09 (+26 days): Python 3.3.4 released
• 2014-03-01 (+46 days): CVE-2014-1912 published
• 2014-03-16: Python 3.4.0 released
• 2014-05-31 (+137 days): Python 2.7.7 released
• 2014-10-12 (+271 days): Python 3.2.6 released