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CVE-2025-69419— Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion

Quick assessment

Affected
OpenSSL OpenSSL
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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版本、3.5版本、3.4版本、3.3版本、3.0版本和1.1.1版本存在安全漏洞，该漏洞源于PKCS12_get_friendlyname函数处理特制PKCS#12文件不当，可能导致越界写入和内存损坏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.56% · P44

Affected Version Matrix 6

VendorProduct Version RangeStatus
OpenSSL OpenSSL 3.6.0< 3.6.1 affected
3.5.0< 3.5.5 affected
3.4.0< 3.4.4 affected
3.3.0< 3.3.6 affected
3.0.0< 3.0.19 affected
1.1.1< 1.1.1ze affected
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I. Basic Information for CVE-2025-69419

Vulnerability Information
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Vulnerability Title
Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion
Source: CVE Program / CVE List V5
Vulnerability Description
Issue summary: Calling PKCS12_get_friendlyname() function on a maliciously crafted PKCS#12 file with a BMPString (UTF-16BE) friendly name containing non-ASCII BMP code point can trigger a one byte write before the allocated buffer. Impact summary: The out-of-bounds write can cause a memory corruption which can have various consequences including a Denial of Service. The OPENSSL_uni2utf8() function performs a two-pass conversion of a PKCS#12 BMPString (UTF-16BE) to UTF-8. In the second pass, when emitting UTF-8 bytes, the helper function bmp_to_utf8() incorrectly forwards the remaining UTF-16 source byte count as the destination buffer capacity to UTF8_putc(). For BMP code points above U+07FF, UTF-8 requires three bytes, but the forwarded capacity can be just two bytes. UTF8_putc() then returns -1, and this negative value is added to the output length without validation, causing the length to become negative. The subsequent trailing NUL byte is then written at a negative offset, causing write outside of heap allocated buffer. The vulnerability is reachable via the public PKCS12_get_friendlyname() API when parsing attacker-controlled PKCS#12 files. While PKCS12_parse() uses a different code path that avoids this issue, PKCS12_get_friendlyname() directly invokes the vulnerable function. Exploitation requires an attacker to provide a malicious PKCS#12 file to be parsed by the application and the attacker can just trigger a one zero byte write before the allocated buffer. For that reason the issue was assessed as Low severity according to our Security Policy. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS#12 implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSSL 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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版本、3.5版本、3.4版本、3.3版本、3.0版本和1.1.1版本存在安全漏洞，该漏洞源于PKCS12_get_friendlyname函数处理特制PKCS#12文件不当，可能导致越界写入和内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenSSL OpenSSL 3.6.0 ~ 3.6.1 -

II. Public POCs for CVE-2025-69419

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III. Intelligence Information for CVE-2025-69419

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Patches & Fixes for CVE-2025-69419 (2)

Vendor Advisories for CVE-2025-69419 (1)

Same Patch Batch · OpenSSL · 2026-01-27 · 12 CVEs total

CVE-2026-22795 Missing ASN1_TYPE validation in PKCS#12 parsing
CVE-2026-22796 ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes() function
CVE-2025-15467 Stack buffer overflow in CMS (Auth)EnvelopedData parsing
CVE-2025-15469 'openssl dgst' one-shot codepath silently truncates inputs >16MB
CVE-2025-15468 NULL dereference in SSL_CIPHER_find() function on unknown cipher ID
CVE-2025-66199 TLS 1.3 CompressedCertificate excessive memory allocation
CVE-2025-68160 Heap out-of-bounds write in BIO_f_linebuffer on short writes
CVE-2025-11187 Improper validation of PBMAC1 parameters in PKCS#12 MAC verification
CVE-2025-69421 NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function
CVE-2025-69420 Missing ASN1_TYPE validation in TS_RESP_verify_response() function
CVE-2025-69418 Unauthenticated/unencrypted trailing bytes with low-level OCB function calls

IV. Related Vulnerabilities

Same product: OpenSSL
Same vendor: OpenSSL
Same weakness: CWE-787

V. Comments for CVE-2025-69419

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