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Vulnerability record · CVE-2015-2157 · published 27 March 2015

CVE-2015-2157: Debian linux information exposure vulnerability

Debian · Debian Linux

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.

2.1 CVSS 2.0 Low EPSS 0.59% · top 54.2% CWE-200 · Information exposure
2.1CVSS 2.0 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
20References
17 Jun 2026Last modified by NVD

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.

AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html PatchVendor Advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html PatchVendor Advisory
http://www.debian.org/security/2015/dsa-3190
http://www.openwall.com/lists/oss-security/2015/02/28/4
http://www.openwall.com/lists/oss-security/2015/02/28/5
http://www.securityfocus.com/bid/72825
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html PatchVendor Advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html PatchVendor Advisory
http://www.debian.org/security/2015/dsa-3190
http://www.openwall.com/lists/oss-security/2015/02/28/4
http://www.openwall.com/lists/oss-security/2015/02/28/5
http://www.securityfocus.com/bid/72825

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Source: NIST National Vulnerability Database (record CVE-2015-2157), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.