CVE-2019-17069

Description

PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1_MSG_DISCONNECT message.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 2.25%• Percentile: 82%

Techniques & Countermeasures

• CWE-416•Use After Free

  The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

• alpine•putty

  < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0 | < 0.73-r0

• debian•putty

  < 0.73-1 | < 0.73-1 | < 0.73-1 | < 0.73-1

• netapp•oncommand_unified_manager_core_package

  na

• opensuse•leap

  15.0 | 15.1

• putty•putty

  < 0.73

References (8)

• https://lists.tartarus.org/pipermail/putty-announce/2019/000029.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00030.html
• https://security.netapp.com/advisory/ntap-20191127-0003/
• https://lists.debian.org/debian-lts-announce/2024/04/msg00016.html
• https://security-tracker.debian.org/tracker/CVE-2019-17069
• https://security.alpinelinux.org/vuln/CVE-2019-17069