QSearchQSearch

CVE-2020-1971

5.9 MEDIUM

The X.509 GeneralName type is a generic type for representing different types of names

Published: 2020-12-08 · Last updated: 2026-05-29

Severity and scoring

CVSS
5.9 MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-476

Affected products

VendorProduct
debianactive_iq_unified_manager, aff_a250_firmware, api_gateway
fedoraprojectactive_iq_unified_manager, aff_a250_firmware, api_gateway
netappactive_iq_unified_manager, aff_a250_firmware, api_gateway
nodejsactive_iq_unified_manager, aff_a250_firmware, api_gateway
opensslactive_iq_unified_manager, aff_a250_firmware, api_gateway
oracleactive_iq_unified_manager, aff_a250_firmware, api_gateway
siemensactive_iq_unified_manager, aff_a250_firmware, api_gateway
tenableactive_iq_unified_manager, aff_a250_firmware, api_gateway

Description

The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. OpenSSL itself uses the GENERAL_NAME_cmp function for two purposes: 1) Comparing CRL distribution point names between an available CRL and a CRL distribution point embedded in an X509 certificate 2) When verifying that a timestamp response token signer matches the timestamp authority name (exposed via the API functions TS_RESP_verify_response and TS_RESP_verify_token) If an attacker can control both items being compared then that attacker could trigger a crash. For example if the attacker can trick a client or server into checking a malicious certificate against a malicious CRL then this may occur. Note that some applications automatically download CRLs based on a URL embedded in a certificate. This checking happens prior to the signatures on the certificate and CRL being verified. OpenSSL's s_server, s_client and verify tools have support for the "-crl_download" option which implements automatic CRL downloading and this attack has been demonstrated to work against those tools. Note that an unrelated bug means that affected versions of OpenSSL cannot parse or construct correct encodings of EDIPARTYNAME. However it is possible to construct a malformed EDIPARTYNAME that OpenSSL's parser will accept and hence trigger this attack. All OpenSSL 1.1.1 and 1.0.2 versions are affected by this issue. Other OpenSSL releases are out of support and have not been checked. Fixed in OpenSSL 1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x (Affected 1.0.2-1.0.2w).

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-35273 — Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: Updates Environment Management) (9.8 CRITICAL)
  • CVE-2026-9076 — Issue summary: When CMS password-based decryption (RFC 3211 / PWRI key unwrap) processes attacker-supplied CMS data, an attacker-chosen s... (7.5 HIGH)
  • CVE-2026-7383 — Issue summary: A signed integer overflow when sizing the destination buffer for Unicode output in ASN1_mbstring_ncopy() can lead to a hea... (8.1 HIGH)
  • CVE-2026-45447 — Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification (8.8 HIGH)
  • CVE-2026-45446 — Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) mishandle the authentication of AAD (Additional Authe... (4.8 MEDIUM)

Same CWE

  • CVE-2026-12329 — Memory safety bug fixed in Thunderbird ESR 140.12 (5.3 MEDIUM)
  • CVE-2025-70102 — A NULL pointer dereference occurs in Roy Marples NetworkConfiguration/dhcpcd 10.3.0 while parsing configuration options (6.3 MEDIUM)
  • CVE-2025-55663 — A segmentation violation in the Track_SetStreamDescriptor function (isomedia/track.c) of GPAC MP4Box v2.4 allows attackers to cause a Den... (5.5 MEDIUM)
  • CVE-2025-55649 — A NULL pointer dereference in the gf_media_map_esd function (media_tools/isom_tools.c) of GPAC MP4Box v2.4 allows attackers to cause a De... (5.5 MEDIUM)
  • CVE-2025-55643 — A NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box v2.4 allows attackers to cause a Den... (5.5 MEDIUM)