漏洞信息
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Vulnerability Title
ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function
Vulnerability Description
Issue summary: A type confusion vulnerability exists in the signature
verification of signed PKCS#7 data where an ASN1_TYPE union member is
accessed without first validating the type, causing an invalid or NULL
pointer dereference when processing malformed PKCS#7 data.
Impact summary: An application performing signature verification of PKCS#7
data or calling directly the PKCS7_digest_from_attributes() function can be
caused to dereference an invalid or NULL pointer when reading, resulting in
a Denial of Service.
The function PKCS7_digest_from_attributes() accesses the message digest attribute
value without validating its type. When the type is not V_ASN1_OCTET_STRING,
this results in accessing invalid memory through the ASN1_TYPE union, causing
a crash.
Exploiting this vulnerability requires an attacker to provide a malformed
signed PKCS#7 to an application that verifies it. The impact of the
exploit is just a Denial of Service, the PKCS7 API is legacy and applications
should be using the CMS API instead. For these reasons the issue was
assessed as Low severity.
The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,
as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module
boundary.
OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
CVSS Information
N/A
Vulnerability Type
对因果或异常条件的不恰当检查
Vulnerability Title
OpenSSL 安全漏洞
Vulnerability Description
OpenSSL是OpenSSL团队的一个开源的能够实现安全套接层(SSLv2/v3)和安全传输层(TLSv1)协议的通用加密库。该产品支持多种加密算法,包括对称密码、哈希算法、安全散列算法等。 OpenSSL 3.6、3.5、3.4、3.3、3.0、1.1.1和1.0.2版本存在安全漏洞,该漏洞源于签名PKCS#7数据验证存在类型混淆,未验证类型即访问ASN1_TYPE联合体成员,可能导致处理畸形PKCS#7数据时取消引用无效或空指针,引发拒绝服务。
CVSS Information
N/A
Vulnerability Type
N/A