openssl: untrusted sender DN used as format string in CMP response validation

A flaw was found in OpenSSL. A malicious CMP Certificate Management Protocol endpoint can send an unexpected distinguished name DN directly as the format string argument to ERRraisedata, causing the application to dereference and write to unrelated stack contents. This can lead to a crash in the...

openssl: untrusted sender DN used as format string in CMP response validation

A flaw was found in OpenSSL. A malicious CMP Certificate Management Protocol endpoint can send an unexpected distinguished name DN directly as the format string argument to ERRraisedata, causing the application to dereference and write to unrelated stack contents. This can lead to a crash in the...

CVE-2026-63073

A flaw was found in OpenSSL. A malicious CMP Certificate Management Protocol endpoint can send an unexpected distinguished name DN directly as the format string argument to ERRraisedata, causing the application to dereference and write to unrelated stack contents. This can lead to a crash in the...

binary-exploitation-writeups

Binary Exploitation Writeups A comprehensive collection of bi...

Use of Externally-Controlled Format String

Overview Affected versions of this package are vulnerable to Use of Externally-Controlled Format String in osslcmpmsgcheckupdate in crypto/cmp/cmpvfy.c. An attacker can crash a CMP client by sending an unexpected response with a sender distinguished name containing format specifiers such as %s or...

CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

AZL-97950 CVE-2026-63073 affecting package openssl for versions less than 3.3.7-6

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

ALPINE-CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073

The OpenSSL library's CMP protocol implementation contains a CWE-134 (Use of Externally-Controlled Format String) vulnerability in the ossl_cmp_msg_check_update() function. The software fails to properly sanitize a peer-supplied sender distinguished name before passing it as a format string to ER...

CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to "ERRraisedata". Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certifica...

CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

EUVD-2026-65483

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

UBUNTU-CVE-2026-63073

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

CVE-2026-63073: Use of Externally-Controlled Format String

Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact summary: A malicious or intercepted CMP endpoint can crash a CMP client that enforces an expected sender or uses a pinned server certificate...

Linux Distros Unpatched Vulnerability : CVE-2026-63073

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directly as the format string to ERRraisedata. Impact...

PT-2026-81304

Name of the Vulnerable Software and Affected Versions OpenSSL affected versions not specified Description An issue exists in the CMP response validation where the ossl cmp msg check update function converts a peer-supplied sender distinguished name using X509 NAME oneline and passes it directly a...