LOW
The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive information by reading the memory
Published Mar 27, 2015
2.1
LOWCVSS 2.0
EPSS 0.58%
Description
The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive information by reading the memory.
Affected products
No data.
Configuration 1
OR
- 7.0
- 20
- 22
- 13.1
- 13.2
Configuration 2
OR
- 0.51
- 0.52
- 0.53b
- 0.54
- 0.55
- 0.56
- 0.57
- 0.58
- 0.59
- 0.60
- 0.61
- 0.62
- 0.63
- 0.53
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
2.1 LOW NVD
AV:L/AC:L/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.58% 0.00585
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00585
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.58% (0.00585) | 45.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.58% (0.00585) | 43.14th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.37% (0.00366) | 56.45th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
Weaknesses (1)
References (10)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html vendor-advisoryx_refsource_SUSE
- http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html x_refsource_CONFIRMPatchVendor Advisory
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html x_refsource_CONFIRMPatchVendor Advisory
- http://www.debian.org/security/2015/dsa-3190 vendor-advisoryx_refsource_DEBIAN
- http://www.openwall.com/lists/oss-security/2015/02/28/4 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2015/02/28/5 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/72825 vdb-entryx_refsource_BID
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html | vendor-advisoryx_refsource_SUSE | |
| http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html | x_refsource_CONFIRMPatchVendor Advisory | |
| http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html | x_refsource_CONFIRMPatchVendor Advisory | |
| http://www.debian.org/security/2015/dsa-3190 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.openwall.com/lists/oss-security/2015/02/28/4 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2015/02/28/5 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/72825 | vdb-entryx_refsource_BID |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 27, 2015
Updated Aug 6, 2024
Reserved Feb 28, 2015
Link CVE-2015-2157
CISA Vulnrichment
Updated n/a