CVE-2015-2157: Infoleak
First published: Fri Mar 27 2015(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian | =7.0 | |
| Fedora | =20 | |
| Fedora | =22 | |
| SUSE Linux | =13.1 | |
| SUSE Linux | =13.2 | |
| PuTTY | =0.51 | |
| PuTTY | =0.52 | |
| PuTTY | =0.53b | |
| PuTTY | =0.54 | |
| PuTTY | =0.55 | |
| PuTTY | =0.56 | |
| PuTTY | =0.57 | |
| PuTTY | =0.58 | |
| PuTTY | =0.59 | |
| PuTTY | =0.60 | |
| PuTTY | =0.61 | |
| PuTTY | =0.62 | |
| PuTTY | =0.63 | |
| PuTTY | =0.53 |
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Reference Links
- 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
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html
- 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
Frequently Asked Questions
What is the severity of CVE-2015-2157?
CVE-2015-2157 has a medium severity level due to its potential to expose sensitive information from memory.
How do I fix CVE-2015-2157?
To fix CVE-2015-2157, upgrade PuTTY to a version later than 0.63 that addresses the memory wiping issue.
Which versions of PuTTY are affected by CVE-2015-2157?
PuTTY versions from 0.51 to 0.63 are affected by CVE-2015-2157.
Can local users exploit CVE-2015-2157?
Yes, local users can exploit CVE-2015-2157 to read sensitive SSH-2 private keys from memory.
Is CVE-2015-2157 specific to any operating system?
CVE-2015-2157 affects multiple operating systems, including Debian and Fedora, using vulnerable versions of PuTTY.
- agent/references
- agent/type
- agent/remedy
- agent/severity
- agent/weakness
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/debian
- canonical/debian
- version/debian/7.0
- vendor/fedoraproject
- canonical/fedora
- version/fedora/20
- version/fedora/22
- vendor/opensuse
- canonical/suse linux
- version/suse linux/13.1
- version/suse linux/13.2
- vendor/putty
- canonical/putty
- version/putty/0.51
- version/putty/0.52
- version/putty/0.53b
- version/putty/0.54
- version/putty/0.55
- version/putty/0.56
- version/putty/0.57
- version/putty/0.58
- version/putty/0.59
- version/putty/0.60
- version/putty/0.61
- version/putty/0.62
- version/putty/0.63
- vendor/simon tatham
- version/putty/0.53