CVE-2021-23841

Aliases:GHSA-84rm-qf37-fgc2RUSTSEC-2021-0058
Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 16 Feb 2021, 16:55
Last modified:16 Sept 2024, 22:39

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.1 (nvd)
EPSS Score
0.96% LOW
1% probability +0.34%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Feb 2021, 16:55
Published
Vulnerability first disclosed
16 Sept 2024, 22:39
Last Modified
Vulnerability information updated

Description

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. 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).

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.96%• Percentile: 77%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • apple•ipados

    < 14.6

  • apple•iphone_os

    < 14.6

  • Unknown•macOS

    ≥ 11.1, < 11.4

  • apple•safari

    < 14.1.1

  • Crates.Io•openssl-src

    < 111.14.0 | ≥ 0.0.0-0, < 111.14.0

  • debian•debian_linux

    10.0

  • netapp•oncommand_insight

    na

  • netapp•oncommand_workflow_automation

    na

  • netapp•snapcenter

    na

  • Unknown•OpenSSL

    ≥ 1.0.2, < 1.0.2y | ≥ 1.1.1, < 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)

  • oracle•business_intelligence

    5.5.0.0.0 | 5.9.0.0.0 | 12.2.1.3.0 | 12.2.1.4.0

  • oracle•communications_cloud_native_core_policy

    1.15.0

  • oracle•enterprise_manager_for_storage_management

    13.4.0.0

  • oracle•enterprise_manager_ops_center

    12.4.0.0

  • oracle•essbase

    21.2

  • oracle•graalvm

    19.3.5 | 20.3.1.2 | 21.0.0.2

  • oracle•jd_edwards_world_security

    a9.4

  • oracle•mysql_enterprise_monitor

    < 8.0.23

  • oracle•mysql_server

    < 5.7.33 | ≥ 8.0.15, < 8.0.23

  • oracle•peoplesoft_enterprise_peopletools

    8.57 | 8.58 | 8.59

  • oracle•zfs_storage_appliance_kit

    8.8

  • siemens•sinec_ins

    < 1.0 | 1.0 | 1.0:sp1

  • tenable•nessus_network_monitor

    5.11.0 | 5.11.1 | 5.12.0 | 5.12.1 | 5.13.0

  • tenable•tenable.sc

    ≥ 5.13.0, ≤ 5.17.0

References (33)