Integer Overflow or Wraparound Affecting openssl package, versions [,1.0.2y)[1.1.1, 1.1.1j)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.69% (81st percentile)

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  • Snyk IDSNYK-UNMANAGED-OPENSSL-2318591
  • published14 Dec 2021
  • disclosed16 Feb 2021
  • creditUnknown

Introduced: 16 Feb 2021

CVE-2021-23840  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade openssl to version 1.0.2y, 1.1.1j or higher.

Overview

Affected versions of this package are vulnerable to Integer Overflow or Wraparound. Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

References

CVSS Scores

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