Vulnerability Report

CVE-2021-34558

Title: Go crypto/tls Package X.509 Certificate Panic

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2021-34558.

CWE Category CWE-295

Published Date Jul 15, 2021

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.92%

Vulnerability Summary

CVE-2021-34558: The crypto/tls package of Go through 1.16.5 does not properly assert that the type of public key in an X.509 certificate matches the expected type when doing a RSA based key exchange, allowing a malicious TLS server to cause a TLS client to panic.

Impacted Vendors

Reference Links

https://golang.org/doc/devel/release#go1.16.minor https://groups.google.com/g/golang-announce https://groups.google.com/g/golang-announce/c/n9FxMelZGAQ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BA7MFVXRBEKRTLSLYDICTYCGEMK2HZ7/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3XBQUFVI5TMV4KMKI7GKA223LHGPQISE/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6BTC3JQUASFN5U2XA4UZIGAPZQBD5JSS/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7FRFM7WWR2JCT6NORQ7AO6B453OMI3I/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITRXPCHUCJGXCX2CUEPKZRRTB27GG4ZB/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYIUSR4YP52PWG7YE7AA3DZ5OSURNFJB/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBMLUQMN6XRKPVOI5XFFBP4XSR7RNTYR/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NLOGBB7XBBRB3J5FDPW5KWHSH7IRF64W/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXJ2MVMAHOIGRH37ZSFYC4EVWLJFL2EQ/ https://security.gentoo.org/glsa/202208-02 https://security.netapp.com/advisory/ntap-20210813-0005/ https://www.oracle.com/security-alerts/cpujan2022.html https://www.oracle.com/security-alerts/cpuoct2021.html https://golang.org/doc/devel/release#go1.16.minor https://groups.google.com/g/golang-announce https://groups.google.com/g/golang-announce/c/n9FxMelZGAQ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BA7MFVXRBEKRTLSLYDICTYCGEMK2HZ7/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3XBQUFVI5TMV4KMKI7GKA223LHGPQISE/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6BTC3JQUASFN5U2XA4UZIGAPZQBD5JSS/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7FRFM7WWR2JCT6NORQ7AO6B453OMI3I/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITRXPCHUCJGXCX2CUEPKZRRTB27GG4ZB/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYIUSR4YP52PWG7YE7AA3DZ5OSURNFJB/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBMLUQMN6XRKPVOI5XFFBP4XSR7RNTYR/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NLOGBB7XBBRB3J5FDPW5KWHSH7IRF64W/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXJ2MVMAHOIGRH37ZSFYC4EVWLJFL2EQ/ https://security.gentoo.org/glsa/202208-02 https://security.netapp.com/advisory/ntap-20210813-0005/ https://www.oracle.com/security-alerts/cpujan2022.html https://www.oracle.com/security-alerts/cpuoct2021.html

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity LOW

2.6

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:H/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-34558 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

July 15, 2021 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction REQUIRED

CVSS Vector String


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

Affected Stack

No specific products linked.