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githubGitHub Advisory DatabaseGHSA-RV6R-3F5Q-9RGX
HistoryMar 03, 2022 - 7:02 p.m.

Twisted SSH client and server deny of service during SSH handshake.

2022-03-0319:02:08
CWE-120
CWE-770
GitHub Advisory Database
github.com
21
twisted ssh
denial of service
github commit
twisted 22.2.0
ssh server
trusted source ip addresses
trusted destination ip addresses
security advisory
github discussions
ssh handshake
memory allocation

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.004

Percentile

73.2%

JSON

Impact

The Twisted SSH client and server implementation naively accepted an infinite amount of data for the peer’s SSH version identifier.

A malicious peer can trivially craft a request that uses all available memory and crash the server, resulting in denial of service. The attack is as simple as nc -rv localhost 22 < /dev/zero.

Patches

The issue was fix in GitHub commit https://github.com/twisted/twisted/commit/98387b39e9f0b21462f6abc7a1325dc370fcdeb1

A fix is available in Twisted 22.2.0.

Workarounds

  • Limit access to the SSH server only to trusted source IP addresses.
  • Connect over SSH only to trusted destination IP addresses.

References

Reported at https://twistedmatrix.com/trac/ticket/10284
Discussions at https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx

For more information

Found by vin01

Affected configurations

Vulners
Node
twistedtwistedRange21.7.0≥
OR
twistedtwistedRange<22.2.0

Related

amazon 1
openvas 12
nessus 13
cve 1
ubuntucve 1
suse 2
debian 1
osv 6
ubuntu 2
prion 1
ibm 2
cnvd 1
nvd 1
veracode 1
alpinelinux 1
debiancve 1
redhatcve 1
cvelist 1
redhat 2
mageia 1
fedora 2
gentoo 1
oracle 1
amazon
amazon
Important: python-twisted-conch
2022-05-31 23:47:00
openvas
openvas
Debian: Security Advisory (DLA-2938-1)
2022-03-09 00:00:00
SUSE: Security Advisory (SUSE-SU-2022:2297-1)
2022-07-07 00:00:00
openSUSE: Security Advisory for python-Twisted (SUSE-SU-2022:2297-1)
2022-07-07 00:00:00
nessus
nessus
SUSE SLES12 Security Update : python-Twisted (SUSE-SU-2022:2117-1)
2022-06-22 00:00:00
Amazon Linux 2022 : (ALAS2022-2022-046)
2022-09-06 00:00:00
Ubuntu 16.04 ESM / 22.04 LTS : Twisted vulnerability (USN-5354-2)
2022-05-05 00:00:00
cve
cve
CVE-2022-21716
2022-03-03 21:15:07
ubuntucve
ubuntucve
CVE-2022-21716
2022-03-03 00:00:00
suse
suse
Security update for python-Twisted (important)
2022-07-06 00:00:00
Security update for python-Twisted (important)
2022-06-14 00:00:00
debian
debian
[SECURITY] [DLA 2938-1] twisted security update
2022-03-08 12:02:36
osv
osv
Twisted SSH client and server deny of service during SSH handshake.
2022-03-03 19:02:08
twisted - security update
2022-03-08 00:00:00
CVE-2022-21716
2022-03-03 21:15:07
ubuntu
ubuntu
Twisted vulnerability
2022-05-05 00:00:00
Twisted vulnerabilities
2022-03-30 00:00:00
prion
prion
Design/Logic Flaw
2022-03-03 21:15:00
ibm
ibm
Security Bulletin: IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data is vulnerable to a denial of service, caused by a buffer overflow in Twisted (CVE-2022-21716)
2023-01-12 21:59:00
Security Bulletin: IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data is vulnerable a denial of service, caused by a buffer overflow with Twisted (CVE-2022-21716)
2023-01-12 21:59:00
cnvd
cnvd
Twisted has unspecified vulnerabilities
2022-03-04 00:00:00
nvd
nvd
CVE-2022-21716
2022-03-03 21:15:07
veracode
veracode
Denial Of Service (DoS)
2022-03-04 01:07:19
alpinelinux
alpinelinux
CVE-2022-21716
2022-03-03 21:15:07
debiancve
debiancve
CVE-2022-21716
2022-03-03 21:15:07
redhatcve
redhatcve
CVE-2022-21716
2022-03-04 17:51:22
cvelist
cvelist
CVE-2022-21716 Buffer Overflow in Twisted
2022-03-03 00:00:00
redhat
redhat
(RHSA-2022:0982) Important: Red Hat OpenStack Platform 16.1 (python-twisted) security update
2022-03-24 09:39:14
(RHSA-2022:0992) Important: Red Hat OpenStack Platform 16.2 (python-twisted) security update
2022-03-23 20:19:53
mageia
mageia
Updated python-twisted packages fix security vulnerability
2022-05-12 13:24:45
fedora
fedora
[SECURITY] Fedora 35 Update: python-twisted-22.4.0-1.fc35
2022-07-03 01:21:11
[SECURITY] Fedora 36 Update: python-twisted-22.4.0-1.fc36
2022-07-03 01:07:05
gentoo
gentoo
Twisted: Multiple Vulnerabilities
2023-01-11 00:00:00
oracle
oracle
Oracle Critical Patch Update Advisory - April 2022
2022-04-19 00:00:00

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.004

Percentile

73.2%

JSON
Related for GHSA-RV6R-3F5Q-9RGX
amazon1openvas12nessus13cve1ubuntucve1suse2debian1osv6ubuntu2prion1ibm2cnvd1nvd1veracode1alpinelinux1debiancve1redhatcve1cvelist1redhat2mageia1fedora2gentoo1oracle1