python: Heap overflow in zipimporter module
Published Sep 2, 2016
9.8
CRITICALCVSS 3.0
EPSS 25.48%
Description
Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 allows remote attackers to have unspecified impact via a negative data size value, which triggers a heap-based buffer overflow.
Affected products
No data.
Configuration 1
- 3.0
- 3.0.1
- 3.1.0
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.2.0
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.3.0
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
No data.
Red Hat Enterprise Linux 7
python-0:2.7.5-48.el7
Fixed · RHSA-2016:2586
Red Hat Enterprise Linux 5
python
Will not fix
Red Hat Enterprise Linux 6
jython
Not affected
Red Hat Enterprise Linux 6
python
Will not fix
Red Hat Software Collections
python27-python
Will not fix
Red Hat Software Collections
python33-python
Will not fix
Red Hat Software Collections
rh-python34-python
Will not fix
Red Hat Software Collections
rh-python35-python
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | python-0:2.7.5-48.el7 | Fixed | RHSA-2016:2586 |
| Red Hat Enterprise Linux 5 | python | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | jython | Not affected | n/a |
| Red Hat Enterprise Linux 6 | python | Will not fix | n/a |
| Red Hat Software Collections | python27-python | Will not fix | n/a |
| Red Hat Software Collections | python33-python | Will not fix | n/a |
| Red Hat Software Collections | rh-python34-python | Will not fix | n/a |
| Red Hat Software Collections | rh-python35-python | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (38 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 25.48% (0.25480) | 97.89th | v5 (v2026.06.15) |
| Sep 22, 2026 | 25.48% (0.25480) | 97.86th | v5 (v2026.06.15) |
| Sep 21, 2026 | 22.40% (0.22402) | 97.64th | v5 (v2026.06.15) |
| Sep 6, 2026 | 25.48% (0.25480) | 97.81th | v5 (v2026.06.15) |
| Sep 5, 2026 | 22.40% (0.22402) | 97.59th | v5 (v2026.06.15) |
| Aug 30, 2026 | 25.48% (0.25480) | 97.80th | v5 (v2026.06.15) |
| Aug 28, 2026 | 22.40% (0.22402) | 97.58th | v5 (v2026.06.15) |
| Aug 24, 2026 | 25.48% (0.25480) | 97.79th | v5 (v2026.06.15) |
| Aug 23, 2026 | 22.40% (0.22402) | 97.57th | v5 (v2026.06.15) |
| Jul 29, 2026 | 26.32% (0.26316) | 97.79th | v5 (v2026.06.15) |
| Jul 24, 2026 | 21.37% (0.21366) | 97.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 25.67% (0.25671) | 97.69th | v5 (v2026.06.15) |
| May 1, 2026 | 45.12% (0.45123) | 97.61th | v4 (v2025.03.14) |
| Apr 1, 2026 | 38.59% (0.38587) | 97.22th | v4 (v2025.03.14) |
| Feb 13, 2026 | 45.12% (0.45123) | 97.50th | v4 (v2025.03.14) |
| Dec 28, 2025 | 63.69% (0.63691) | 98.33th | v4 (v2025.03.14) |
| Dec 27, 2025 | 66.94% (0.66935) | 98.50th | v4 (v2025.03.14) |
| Oct 28, 2025 | 63.69% (0.63691) | 98.32th | v4 (v2025.03.14) |
| Oct 27, 2025 | 66.94% (0.66935) | 98.48th | v4 (v2025.03.14) |
| Oct 1, 2025 | 63.69% (0.63691) | 98.37th | v4 (v2025.03.14) |
| Aug 20, 2025 | 66.94% (0.66935) | 98.48th | v4 (v2025.03.14) |
| Aug 18, 2025 | 64.31% (0.64308) | 98.36th | v4 (v2025.03.14) |
| Jul 30, 2025 | 65.88% (0.65882) | 98.43th | v4 (v2025.03.14) |
| Jul 13, 2025 | 62.56% (0.62561) | 98.27th | v4 (v2025.03.14) |
| Jul 12, 2025 | 59.69% (0.59692) | 98.13th | v4 (v2025.03.14) |
| Jun 28, 2025 | 56.60% (0.56597) | 97.97th | v4 (v2025.03.14) |
| Mar 30, 2025 | 44.71% (0.44712) | 97.31th | v4 (v2025.03.14) |
| Mar 29, 2025 | 55.68% (0.55676) | 97.22th | v4 (v2025.03.14) |
| Mar 28, 2025 | 44.71% (0.44712) | 97.30th | v4 (v2025.03.14) |
| Mar 27, 2025 | 55.68% (0.55676) | 97.77th | v4 (v2025.03.14) |
| Mar 20, 2025 | 44.71% (0.44712) | 97.33th | v4 (v2025.03.14) |
| Mar 19, 2025 | 55.68% (0.55676) | 97.80th | v4 (v2025.03.14) |
| Mar 17, 2025 | 44.71% (0.44712) | 97.27th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.61% (0.01606) | 87.06th | v3 (v2023.03.01) |
| Aug 6, 2023 | 2.77% (0.02772) | 89.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.97% (0.01974) | 86.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 37.15% (0.37149) | 97.90th | v2 (v2022.01.01) |
| Feb 4, 2022 | 37.15% (0.37149) | 97.07th | v2 (v2022.01.01) |
References (19)
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2016-2586.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/06/15/15 mailing-listx_refsource_MLISTMailing List
- http://www.openwall.com/lists/oss-security/2016/06/16/1 mailing-listx_refsource_MLISTMailing List
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/91247 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1038138 vdb-entryx_refsource_SECTRACK
- http://www.splunk.com/view/SP-CAAAPSV x_refsource_CONFIRM
- http://www.splunk.com/view/SP-CAAAPUE x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2016-5636 Vendor Advisory
- https://bugs.python.org/issue26171 x_refsource_CONFIRMIssue TrackingPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=1345856 Issue Tracking
- https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5 x_refsource_CONFIRMRelease Notes
- https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2 x_refsource_CONFIRMRelease Notes
- https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS x_refsource_CONFIRMRelease Notes
- https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2016-5636
- https://security.gentoo.org/glsa/201701-18 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-5636
Change history (0)
No recorded changes yet.