Limit imaplib.IMAP4_SSL.readline()¶
The imaplib module doesn’t limit the amount of read data in its call to
IMAP4_SSL.readline()
. An erroneous or malicious IMAP server can trick
the imaplib module to consume large amounts of memory.
Dates:
- Disclosure date: 2012-09-25 (Python issue bpo-16039 reported)
Fixed In¶
- Python 2.7.16 (2019-03-02) fixed by commit 16d6320 (branch 2.7) (2018-12-12)
Python issue¶
imaplib: unlimited readline() from connection.
- Python issue: bpo-16039
- Creation date: 2012-09-25
- Reporter: Christian Heimes
CVE-2013-1752¶
** REJECT ** Various versions of Python do not properly restrict readline calls, which allows remote attackers to cause a denial of service (memory consumption) via a long string, related to (1) httplib - fixed in 2.7.4, 2.6.9, and 3.3.3; (2) ftplib - fixed in 2.7.6, 2.6.9, 3.3.3; (3) imaplib - not yet fixed in 2.7.x, fixed in 2.6.9, 3.3.3; (4) nntplib - fixed in 2.7.6, 2.6.9, 3.3.3; (5) poplib - not yet fixed in 2.7.x, fixed in 2.6.9, 3.3.3; and (6) smtplib - not yet fixed in 2.7.x, fixed in 2.6.9, not yet fixed in 3.3.x. NOTE: this was REJECTed because it is incompatible with CNT1 “Independently Fixable” in the CVE Counting Decisions.
- CVE ID: CVE-2013-1752
- Published: 2019-06-03
- CVSS Score: 5.0
Timeline¶
Timeline using the disclosure date 2012-09-25 as reference:
- 2012-09-25: Python issue bpo-16039 reported by Christian Heimes
- 2018-12-12 (+2269 days): commit 16d6320 (branch 2.7)
- 2019-03-02 (+2349 days): Python 2.7.16 released
- 2019-06-03 (+2442 days): CVE-2013-1752 published