CVE-2019-9897
Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
02 Description
Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.93% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2019-03-21 02:31Z7 YR AGO
- Last updated
- 2024-08-04 22:01Z2 YR AGO
- Reserved
- 2019-03-20
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- No CWE assigned
- Data version
- 5.1
- Document digest
- 018d7bcfc047ed3fb464c1f75d66dbcd23fbfe85e9b9ab40c7247be97074d73d
05 Affected products
06 References
- www.chiark.greenend.org.ukhttps://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
- lists.fedoraproject.orgFEDORA-2019-5776dfe300https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES/
- lists.fedoraproject.orgFEDORA-2019-9e1a1cd634https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2/
- lists.opensuse.orgopenSUSE-SU-2019:1113http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.html
- lists.opensuse.orgopenSUSE-SU-2019:1123http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.html
- seclists.org20190403 [SECURITY] [DSA 4423-1] putty security updatehttps://seclists.org/bugtraq/2019/Apr/6
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20190404-0001/
- www.debian.orgDSA-4423https://www.debian.org/security/2019/dsa-4423
- lists.debian.org[debian-lts-announce] 20190424 [SECURITY] [DLA 1763-1] putty security updatehttps://lists.debian.org/debian-lts-announce/2019/04/msg00023.html
07 Fixed in
Debian 12
- putty Fixed in 0.70-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- putty Fixed in 0.70-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- putty Fixed in 0.70-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- putty Fixed in 0.67-3+deb9u1build0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- putty No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.