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TI-2023-27866 Aliases CVE-2023-50981GHSA-wrgh-jm24-7hv6

ModularSquareRoot in Crypto++ (aka cryptopp) through 8.9.0 allows attackers to cause a…

Priority MEDIUM 40CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-835.

Summary

ModularSquareRoot in Crypto++ (aka cryptopp) through 8.9.0 allows attackers to cause a denial of service (infinite loop) via crafted DER public-key data associated with squared odd numbers, such as the square of 268995137513890432434389773128616504853.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00762 55th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:*up to 8.9.0VulnerableCryptopp
  • cpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:* Versions up to 8.9.0 Vulnerable ·Cryptopp

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-50981
  2. 2026-10-03 Alias added: GHSA-wrgh-jm24-7hv6

References

Exploit 1

  • TI-2022-24110 Crypto++ through 8.4 contains a timing side channel in ECDSA signature generation. CVSS 3.1HIGH 7.5
  • TI-2016-08052 Crypto++ (aka cryptopp and libcrypto++) 5.6.4 contained a bug in its ASN.1 BER decoding… CVSS 3.0HIGH 7.5
  • TI-2016-06416 Crypto++ 5.6.4 incorrectly uses Microsoft's stack-based _malloca and _freea functions. CVSS 3.0HIGH 7.5
  • TI-2016-03396 The timing attack protection in Rijndael::Enc::ProcessAndXorBlock and… CVSS 3.0HIGH 7.5
  • TI-2023-27865 gf2n.cpp in Crypto++ (aka cryptopp) through 8.9.0 allows attackers to cause a denial of… CVSS 3.1HIGH 7.5
  • TI-2019-10669 Crypto++ 8.3.0 and earlier contains a timing side channel in ECDSA signature generation. CVSS 3.0MEDIUM 5.9
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences