Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2015-2157

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.

Security Impact Summary

CVE-2015-2157 is a security vulnerability that . Impacting 5 products from debian, from fedoraproject, from opensuse and 2 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2015-03-27T14:59:05.697

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 2.1 (LOW)

CVSSv2 Vector

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

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	debian	debian_linux	7.0	Yes
Operating System	fedoraproject	fedora	20	Yes
Operating System	fedoraproject	fedora	22	Yes
Operating System	opensuse	opensuse	13.1	Yes
Operating System	opensuse	opensuse	13.2	Yes
Application	putty	putty	0.51	Yes
Application	putty	putty	0.52	Yes
Application	putty	putty	0.53b	Yes
Application	putty	putty	0.54	Yes
Application	putty	putty	0.55	Yes
Application	putty	putty	0.56	Yes
Application	putty	putty	0.57	Yes
Application	putty	putty	0.58	Yes
Application	putty	putty	0.59	Yes
Application	putty	putty	0.60	Yes
Application	putty	putty	0.61	Yes
Application	putty	putty	0.62	Yes
Application	putty	putty	0.63	Yes
Application	simon_tatham	putty	0.53	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html ([email protected])
http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html ([email protected])
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html Patch, Vendor Advisory ([email protected])
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html Patch, Vendor Advisory ([email protected])
http://www.debian.org/security/2015/dsa-3190 ([email protected])
http://www.openwall.com/lists/oss-security/2015/02/28/4 ([email protected])
http://www.openwall.com/lists/oss-security/2015/02/28/5 ([email protected])
http://www.securityfocus.com/bid/72825 ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2015-03/msg00032.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2015/dsa-3190 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2015/02/28/4 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2015/02/28/5 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/72825 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For debian's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.