Information disclosure in Putty
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.1 (Low). Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.006 (47.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Putty — versions 0.51, 0.52, 0.53b
- Simon Tatham Putty — versions 0.53
- Debian Linux — versions 7.0
- Fedoraproject Fedora — versions 20, 22
- openSUSE — versions 13.1, 13.2
Weakness classification (CWE)
References
- www.chiark.greenend.org.uk/~sgtatham/putty/changes.html (Patch, Vendor Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-March/151933.html (vendor-advisory)
- www.securityfocus.com/bid/72825 (vdb-entry)
- www.debian.org/security/2015/dsa-3190 (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-March/151790.html (vendor-advisory)
- www.openwall.com/lists/oss-security/2015/02/28/4 (mailing-list)
- www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/private-key-not-wiped-2.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2015/02/28/5 (mailing-list)
- lists.opensuse.org/opensuse-updates/2015-03/msg00032.html (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-March/151839.html (vendor-advisory)