Email header injection in Address objects¶
Warning
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The canonical database for vulnerabilities affecting Python is available on GitHub in the Open Source Vulnerability (OSV) format. This database can be viewed online at the Open Source Vulnerability Database.
It is possible to inject email headers using CR or LF character.
The fix disallows CR and LF characters in email.headerregistry.Address
arguments to guard against header injection attacks.
Dates:
- Disclosure date: 2019-12-17 (Python issue bpo-39073 reported)
Fixed In¶
- Python 3.5.10 (2020-09-05) fixed by commit f91a0b6 (branch 3.5) (2020-06-12)
- Python 3.6.11 (2020-06-27) fixed by commit 7df32f8 (branch 3.6) (2020-05-27)
- Python 3.7.8 (2020-06-27) fixed by commit a93bf82 (branch 3.7) (2020-05-27)
- Python 3.8.4 (2020-07-13) fixed by commit 75635c6 (branch 3.8) (2020-05-27)
- Python 3.9.0 (2020-10-05) fixed by commit 614f172 (branch 3.9) (2020-03-30)
Python issue¶
[security] email module incorrect handling of CR and LF newline characters in Address objects.
- Python issue: bpo-39073
- Creation date: 2019-12-17
- Reporter: Jasper Spaans
Timeline¶
Timeline using the disclosure date 2019-12-17 as reference:
- 2019-12-17: Python issue bpo-39073 reported by Jasper Spaans
- 2020-03-30 (+104 days): commit 614f172 (branch 3.9)
- 2020-05-27 (+162 days): commit 75635c6 (branch 3.8)
- 2020-05-27 (+162 days): commit 7df32f8 (branch 3.6)
- 2020-05-27 (+162 days): commit a93bf82 (branch 3.7)
- 2020-06-12 (+178 days): commit f91a0b6 (branch 3.5)
- 2020-06-27 (+193 days): Python 3.6.11 released
- 2020-06-27 (+193 days): Python 3.7.8 released
- 2020-07-13 (+209 days): Python 3.8.4 released
- 2020-09-05 (+263 days): Python 3.5.10 released
- 2020-10-05: Python 3.9.0 released