Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-23840 First vendor Publication 2021-02-16
Vendor Cve Last vendor Modification 2021-10-22

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23840

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 355
Application 1
Application 3
Application 1
Application 2
Application 1
Application 5
Os 1

Sources (Detail)

Source Url
CONFIRM https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a51b9e1d0cf0bf8...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9b1129239f3ebb1d...
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846
https://kc.mcafee.com/corporate/index?page=content&id=SB10366
https://security.netapp.com/advisory/ntap-20210219-0009/
https://www.openssl.org/news/secadv/20210216.txt
https://www.tenable.com/security/tns-2021-03
https://www.tenable.com/security/tns-2021-09
https://www.tenable.com/security/tns-2021-10
DEBIAN https://www.debian.org/security/2021/dsa-4855
GENTOO https://security.gentoo.org/glsa/202103-03
MISC https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.oracle.com/security-alerts/cpuoct2021.html
MLIST https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db560...
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61...
N/A https://www.oracle.com//security-alerts/cpujul2021.html

Alert History

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Date Informations
2021-10-22 13:23:17
  • Multiple Updates
2021-10-20 17:23:16
  • Multiple Updates
2021-09-14 00:23:06
  • Multiple Updates
2021-08-05 01:42:17
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2021-07-21 05:23:01
  • Multiple Updates
2021-07-15 05:23:01
  • Multiple Updates
2021-06-29 21:23:19
  • Multiple Updates
2021-06-28 21:23:15
  • Multiple Updates
2021-06-17 21:23:32
  • Multiple Updates
2021-06-15 00:23:04
  • Multiple Updates
2021-06-03 00:23:01
  • Multiple Updates
2021-05-12 05:22:56
  • Multiple Updates
2021-05-04 14:08:22
  • Multiple Updates
2021-04-22 03:13:41
  • Multiple Updates
2021-03-31 21:23:19
  • Multiple Updates
2021-03-26 12:38:11
  • Multiple Updates
2021-02-19 17:22:57
  • Multiple Updates
2021-02-18 21:23:34
  • Multiple Updates
2021-02-16 21:23:27
  • First insertion