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Vulnerabilities

Vulnerability · CVE-2015-0204

The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downg

Published Jan 9, 2015 · catalog updated Oct 15, 2026 · OpenSSL OpenSSL

Patch now

CVE-2015-0204 is in the CISA known-exploited catalog. Confirm OpenSSL OpenSSL against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Medium4.3
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
98.69%
Remediation
Remediation guidance
Affected products
Debian:12 openssl · Debian:13 openssl · Debian:14 openssl · cpe openssl/openssl · vendor OpenSSL OpenSSL · vendor n/a n/a

The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncompliant role, related to the "FREAK" issue. NOTE: the scope of this CVE is only client code based on OpenSSL, not EXPORT_RSA issues associated with servers or other TLS implementations.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 openssl0 → 1.0.1k-1
  • Debian:13 openssl0 → 1.0.1k-1
  • Debian:14 openssl0 → 1.0.1k-1
  • cpe openssl/opensslversion unspecified
  • cpe openssl/openssl1.0.0a
  • cpe openssl/openssl1.0.0b
  • cpe openssl/openssl1.0.0c
  • cpe openssl/openssl1.0.0d
  • cpe openssl/openssl1.0.0e
  • cpe openssl/openssl1.0.0f
  • cpe openssl/openssl1.0.0g
  • vendor OpenSSL OpenSSLversion unspecified
  • vendor n/a n/aversion unspecified

How to fix CVE-2015-0204

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2015-0204 is in the CISA known-exploited catalog. Confirm OpenSSL OpenSSL against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 0 → 1.0.1k-1, 1.0.0a, 1.0.0b, 1.0.0c, 1.0.0d, 1.0.0e. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-310. EPSS 98.69%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 9, 2015 · NIST NVD

    Detected

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncompliant role, related to the "FREAK" issue. NOTE: the scope of this CVE is only client code based on OpenSSL, not EXPORT_R

  2. Apr 26, 2016 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. Oct 14, 2026 · NIST NVD

    Updated

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncompliant role, related to the "FREAK" issue. NOTE: the scope of this CVE is only client code based on OpenSSL, not EXPORT_R

  4. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    openssl fixed in 1.0.1k-1; openssl fixed in 1.0.1k-1; openssl fixed in 1.0.1k-1

  5. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    openssl fixed in 1.0.1k-1

  6. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncompliant role, related to the "FREAK" issue. NOTE: the scope of this CVE is only client code based on OpenSSL, not EXPORT_R

Sources

  • CVE.orgVulnerability recordCVE-2015-0204

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncomp

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2015-0204

    30-day exploitation probability 98.7%

    first.org
  • NIST NVDVulnerability recordCVE-2015-0204

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncomp

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2015-0204
    osv.dev
  • VulnCheck KEVConfirmed exploitationCVE-2015-0204

    The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncomp

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.