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Medium 5.9Published Mar 25, 2021
CVE-2021-3449NULL pointer deref in signature_algorithms processing
Updated under an hour ago ()
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It affects OpenSSL and 58 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).
- CVSS
- 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- openssl
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OpenSSL OpenSSL openssl:openssl (from the name) | Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j) | CNA record |
openssl openssl openssl:openssl | from 1.1.1 before 1.1.1k | NVD |
debian debian_linux debian:debian_linux | 9.0; 10.0 | NVD |
freebsd freebsd freebsd:freebsd | 12.2; 12.2; 12.2 | NVD |
netapp active_iq_unified_manager netapp:active_iq_unified_manager | all versions | NVD |
netapp cloud_volumes_ontap_mediator netapp:cloud_volumes_ontap_mediator | all versions | NVD |
netapp e-series_performance_analyzer netapp:e-series_performance_analyzer | all versions | NVD |
netapp oncommand_insight netapp:oncommand_insight | all versions | NVD |
netapp oncommand_workflow_automation netapp:oncommand_workflow_automation | all versions | NVD |
netapp ontap_select_deploy_administration_utility netapp:ontap_select_deploy_administration_utility | all versions | NVD |
netapp santricity_smi-s_provider netapp:santricity_smi-s_provider | all versions | NVD |
netapp snapcenter netapp:snapcenter | all versions | NVD |
netapp storagegrid netapp:storagegrid | all versions | NVD |
tenable log_correlation_engine tenable:log_correlation_engine | before 6.0.9 | NVD |
tenable nessus tenable:nessus | through 8.13.1 | NVD |
tenable nessus_network_monitor tenable:nessus_network_monitor | 5.11.0; 5.11.1; 5.12.0; 5.12.1; 5.13.0 | NVD |
tenable tenable.sc tenable:tenable.sc | from 5.13.0 through 5.17.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 34 | NVD |
mcafee web_gateway mcafee:web_gateway | 8.2.19; 9.2.10; 10.1.1 | NVD |
mcafee web_gateway_cloud_service mcafee:web_gateway_cloud_service | 8.2.19; 9.2.10; 10.1.1 | NVD |
checkpoint quantum_security_management_firmware checkpoint:quantum_security_management_firmware | r80.40; r81 | NVD |
checkpoint multi-domain_management_firmware checkpoint:multi-domain_management_firmware | r80.40; r81 | NVD |
checkpoint quantum_security_gateway_firmware checkpoint:quantum_security_gateway_firmware | r80.40; r81 | NVD |
oracle communications_communications_policy_management oracle:communications_communications_policy_management | 12.6.0.0.0 | NVD |
oracle enterprise_manager_for_storage_management oracle:enterprise_manager_for_storage_management | 13.4.0.0 | NVD |
oracle essbase oracle:essbase | 21.2 | NVD |
oracle graalvm oracle:graalvm | 19.3.5; 20.3.1.2; 21.0.0.2 | NVD |
oracle jd_edwards_enterpriseone_tools oracle:jd_edwards_enterpriseone_tools | before 9.2.6.0 | NVD |
oracle jd_edwards_world_security oracle:jd_edwards_world_security | a9.4 | NVD |
oracle mysql_connectors oracle:mysql_connectors | through 8.0.23 | NVD |
oracle mysql_server oracle:mysql_server | through 5.7.33; from 8.0.15 through 8.0.23 | NVD |
oracle mysql_workbench oracle:mysql_workbench | through 8.0.23 | NVD |
oracle peoplesoft_enterprise_peopletools oracle:peoplesoft_enterprise_peopletools | 8.57; 8.58; 8.59 | NVD |
oracle primavera_unifier oracle:primavera_unifier | from 17.7 through 17.12; 19.12; 20.12; 21.12 | NVD |
oracle secure_backup oracle:secure_backup | before 18.1.0.1.0 | NVD |
oracle secure_global_desktop oracle:secure_global_desktop | 5.6 | NVD |
oracle zfs_storage_appliance_kit oracle:zfs_storage_appliance_kit | 8.8 | NVD |
sonicwall sma100_firmware sonicwall:sma100_firmware | from 10.2.0.0 before 10.2.1.0-17sv | NVD |
sonicwall capture_client sonicwall:capture_client | 3.5 | NVD |
sonicwall sonicos sonicwall:sonicos | 7.0.1.0 | NVD |
siemens ruggedcom_rcm1224_firmware siemens:ruggedcom_rcm1224_firmware | from 6.2 | NVD |
siemens scalance_lpe9403_firmware siemens:scalance_lpe9403_firmware | all versions | NVD |
siemens scalance_m-800_firmware siemens:scalance_m-800_firmware | from 6.2 | NVD |
siemens scalance_s602_firmware siemens:scalance_s602_firmware | from 4.1 | NVD |
siemens scalance_s612_firmware siemens:scalance_s612_firmware | from 4.1 | NVD |
siemens scalance_s615_firmware siemens:scalance_s615_firmware | from 6.2 | NVD |
siemens scalance_s623_firmware siemens:scalance_s623_firmware | from 4.1 | NVD |
siemens scalance_s627-2m_firmware siemens:scalance_s627-2m_firmware | from 4.1 | NVD |
siemens scalance_sc-600_firmware siemens:scalance_sc-600_firmware | from 2.0 | NVD |
siemens scalance_w700_firmware siemens:scalance_w700_firmware | from 6.5 | NVD |
siemens scalance_w1700_firmware siemens:scalance_w1700_firmware | from 2.0 | NVD |
siemens scalance_xb-200_firmware siemens:scalance_xb-200_firmware | before 4.3 | NVD |
siemens scalance_xc-200_firmware siemens:scalance_xc-200_firmware | before 4.3 | NVD |
siemens scalance_xf-200ba_firmware siemens:scalance_xf-200ba_firmware | before 4.3 | NVD |
siemens scalance_xm-400_firmware siemens:scalance_xm-400_firmware | before 6.4 | NVD |
siemens scalance_xp-200_firmware siemens:scalance_xp-200_firmware | before 4.3 | NVD |
siemens scalance_xr-300wg_firmware siemens:scalance_xr-300wg_firmware | before 4.3 | NVD |
siemens scalance_xr524-8c_firmware siemens:scalance_xr524-8c_firmware | before 6.4 | NVD |
siemens scalance_xr526-8c_firmware siemens:scalance_xr526-8c_firmware | before 6.4 | NVD |
siemens scalance_xr528-6m_firmware siemens:scalance_xr528-6m_firmware | before 6.4 | NVD |
References
- https://www.openssl.org/news/secadv/20210325.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJdvendor-advisory
- https://www.debian.org/security/2021/dsa-4875vendor-advisory
- http://www.openwall.com/lists/oss-security/2021/03/27/1mailing-list
- http://www.openwall.com/lists/oss-security/2021/03/27/2mailing-list
- http://www.openwall.com/lists/oss-security/2021/03/28/3mailing-list
- http://www.openwall.com/lists/oss-security/2021/03/28/4mailing-list
- https://security.gentoo.org/glsa/202103-03vendor-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/vendor-advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.tenable.com/security/tns-2021-10
- https://www.tenable.com/security/tns-2021-09
- https://security.netapp.com/advisory/ntap-20210513-0002/
- https://security.netapp.com/advisory/ntap-20210326-0006/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc
- https://www.tenable.com/security/tns-2021-06
- https://www.tenable.com/security/tns-2021-05
- https://kc.mcafee.com/corporate/index?page=content&id=SB10356
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013
- https://lists.debian.org/debian-lts-announce/2021/08/msg00029.htmlmailing-list
- https://www.oracle.com/security-alerts/cpuoct2021.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.