5.3

CVE-2020-1730: canonical ubuntu_linux NULL Pointer Dereference

CVSS: 5.3v3.1MediumModified
AliasesALPINE-CVE-2020-1730MGASA-2020-0171SUSE-SU-2020:0967-1
Published 13-04-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-1730 is a medium (CVSS 5.3) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 3.14% chance of exploitation in the next 30 days, higher than 87.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
3.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 2
RHSA-2020:4545SUSE-SU-2024:0525-1SUSE-SU-2024:0539-1

Timeline

  1. 13-04-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.

CVSS metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

3.14%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

0.00 pp

From 3.14% on 18-09-2026

18-09-202618-10-2026
EPSS score
3.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse4 products
  • libssh&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 0.8.7-10.12.1
  • libssh&distro=SUSE Linux Enterprise Server 12 SP5< 0.8.7-3.9.1
  • libssh&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 0.8.7-3.9.1
  • libssh&distro=SUSE Linux Enterprise Software Development Kit 12 SP5< 0.8.7-3.9.1
Redhat3 products
  • enterprise_linux8.0
  • redhat-virtualization-host< 0:4.4.3-20201116.0.el8_3
  • redhat-virtualization-host-image-update< 0:4.4.3-20201116.0.el8_3
Opensuse2 products
  • libssh&distro=openSUSE Leap 15.1< 0.8.7-lp151.2.12.1
  • libssh&distro=openSUSE Tumbleweed< 0.9.6-2.1
Alpine1 product
  • libssh≥ 0.8.0, < 0.8.9-r0 | ≥ 0.8.0, < 0.9.4-r0 | ≥ 0.8.0, < 0.7.6-r3
Canonical1 product
Debian1 product
  • libssh< 0.9.4-1
Fedoraproject1 product
Libssh1 product
  • libssh≥ 0.8.0, < 0.8.9 | ≥ 0.9.0, < 0.9.4
Mageia1 product
  • libssh< 0.8.9-1.mga7
Netapp1 product
Oracle1 product
Red hat1 product
  • libsshlibssh versions before 0.8.9 | libssh versions before 0.9.4
Ubuntu1 product
  • libssh< 0.8.0~20170825.94fa1e38-1ubuntu0.6

13 vendors · 19 products

References

31 links
Show all 31 references