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10 vulnerabilities found for CryptX by MIK
CVE-2026-13758 (GCVE-0-2026-13758)
Vulnerability from nvd – Published: 2026-06-29 20:42 – Updated: 2026-06-30 13:56
VLAI
EPSS
VEX
Title
CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in non-constant time in the streaming decrypt_done path
Summary
CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in non-constant time in the streaming decrypt_done path.
The decrypt_done($tag) form compares it against the computed tag with memNE (memcmp() != 0), which short-circuits on the first differing byte, so its run time depends on the number of matching leading bytes. This affects all five AEAD modes: GCM, CCM, ChaCha20Poly1305, EAX and OCB. The one-shot *_decrypt_verify helpers are unaffected; they verify the tag inside libtomcrypt with a constant-time comparison.
The timing difference is a tag-verification oracle. An attacker who can submit many candidate tags for the same nonce, ciphertext and associated data while measuring the timing precisely enough may recover the expected tag byte by byte and forge a message that verifies.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
3 references
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CVE-2026-41565 (GCVE-0-2026-41565)
Vulnerability from nvd – Published: 2026-05-28 14:13 – Updated: 2026-05-29 15:53
VLAI
EPSS
VEX
Title
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers
Summary
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.
The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.
Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
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CVE-2026-41564 (GCVE-0-2026-41564)
Vulnerability from nvd – Published: 2026-04-23 07:29 – Updated: 2026-04-23 13:05
VLAI
EPSS
VEX
Title
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking
Summary
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking.
The Crypt::PK::RSA, Crypt::PK::DSA, Crypt::PK::DH, Crypt::PK::ECC, Crypt::PK::Ed25519 and Crypt::PK::X25519 modules seed a per-object PRNG state in their constructors and reuse it without fork detection. A Crypt::PK::* object created before `fork()` shares byte-identical PRNG state with every child process, and any randomized operation they perform can produce identical output, including key generation. Two ECDSA or DSA signatures from different processes are enough to recover the signing private key through nonce-reuse key recovery.
This affects preforking services such as the Starman web server, where a Crypt::PK::* object loaded at startup is inherited by every worker process.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
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CVE-2025-40912 (GCVE-0-2025-40912)
Vulnerability from nvd – Published: 2025-06-11 17:48 – Updated: 2025-06-11 18:44
VLAI
EPSS
VEX
Title
CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode
Summary
CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode.
CryptX embeds the tomcrypt library. The versions of that library in CryptX before 0.065 may be susceptible to CVE-2019-17362.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-1395 - Dependency on Vulnerable Third-Party Component
Assigner
References
1 reference
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CVE-2025-40914 (GCVE-0-2025-40914)
Vulnerability from nvd – Published: 2025-06-11 14:06 – Updated: 2025-06-11 14:43
VLAI
EPSS
VEX
Title
Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow
Summary
Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow.
CryptX embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-1395 - Dependency on Vulnerable Third-Party Component
Assigner
References
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CVE-2026-13758 (GCVE-0-2026-13758)
Vulnerability from cvelistv5 – Published: 2026-06-29 20:42 – Updated: 2026-06-30 13:56
VLAI
EPSS
VEX
Title
CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in non-constant time in the streaming decrypt_done path
Summary
CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in non-constant time in the streaming decrypt_done path.
The decrypt_done($tag) form compares it against the computed tag with memNE (memcmp() != 0), which short-circuits on the first differing byte, so its run time depends on the number of matching leading bytes. This affects all five AEAD modes: GCM, CCM, ChaCha20Poly1305, EAX and OCB. The one-shot *_decrypt_verify helpers are unaffected; they verify the tag inside libtomcrypt with a constant-time comparison.
The timing difference is a tag-verification oracle. An attacker who can submit many candidate tags for the same nonce, ciphertext and associated data while measuring the timing precisely enough may recover the expected tag byte by byte and forge a message that verifies.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
3 references
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CVE-2026-41565 (GCVE-0-2026-41565)
Vulnerability from cvelistv5 – Published: 2026-05-28 14:13 – Updated: 2026-05-29 15:53
VLAI
EPSS
VEX
Title
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers
Summary
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.
The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.
Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
4 references
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CVE-2026-41564 (GCVE-0-2026-41564)
Vulnerability from cvelistv5 – Published: 2026-04-23 07:29 – Updated: 2026-04-23 13:05
VLAI
EPSS
VEX
Title
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking
Summary
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking.
The Crypt::PK::RSA, Crypt::PK::DSA, Crypt::PK::DH, Crypt::PK::ECC, Crypt::PK::Ed25519 and Crypt::PK::X25519 modules seed a per-object PRNG state in their constructors and reuse it without fork detection. A Crypt::PK::* object created before `fork()` shares byte-identical PRNG state with every child process, and any randomized operation they perform can produce identical output, including key generation. Two ECDSA or DSA signatures from different processes are enough to recover the signing private key through nonce-reuse key recovery.
This affects preforking services such as the Starman web server, where a Crypt::PK::* object loaded at startup is inherited by every worker process.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
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CVE-2025-40912 (GCVE-0-2025-40912)
Vulnerability from cvelistv5 – Published: 2025-06-11 17:48 – Updated: 2025-06-11 18:44
VLAI
EPSS
VEX
Title
CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode
Summary
CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode.
CryptX embeds the tomcrypt library. The versions of that library in CryptX before 0.065 may be susceptible to CVE-2019-17362.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-1395 - Dependency on Vulnerable Third-Party Component
Assigner
References
1 reference
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CVE-2025-40914 (GCVE-0-2025-40914)
Vulnerability from cvelistv5 – Published: 2025-06-11 14:06 – Updated: 2025-06-11 14:43
VLAI
EPSS
VEX
Title
Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow
Summary
Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow.
CryptX embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-1395 - Dependency on Vulnerable Third-Party Component
Assigner
References
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