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CVE-2006-2940

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause...

7.8 HighFix available

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Exploit likelihood

5.10%Down 19.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.8

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
CVE-2006-2940
CVSS 2.0
7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
CVE-2006-2940
Updated
2026-11-02
EUVDEUVD-2006-2937 No score

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
EUVD-2006-2937
Updated
2026-11-03
GitHub AdvisoriesGHSA-6qr5-8633-2jmp No score

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause...

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
GHSA-6qr5-8633-2jmp
Updated
2026-11-02
OSV No score

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
CVE-2006-2940
Updated
2026-11-02
OSVDEBIAN-CVE-2006-2940 No score

OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.

Record
DEBIAN-CVE-2006-2940
Updated
2026-11-02
Show 4 moreShow less
OSVopenSUSE-SU-2024:11125-1 No score

libopenssl-devel-1.1.1l-1.2 on GA media

These are all security issues fixed in the libopenssl-devel-1.1.1l-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11125-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11126-1 No score

libopenssl-1_0_0-devel-1.0.2u-6.2 on GA media

These are all security issues fixed in the libopenssl-1_0_0-devel-1.0.2u-6.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11126-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11127-1 No score

libopenssl-1_1-devel-1.1.1l-1.2 on GA media

These are all security issues fixed in the libopenssl-1_1-devel-1.1.1l-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11127-1
Updated
2026-11-02
OSVSUSE-FU-2022:0445-1 No score

Feature update for venv-salt-minion

This feature update for venv-salt-minion provides the following changes:

  • Introduce venv-salt-minion.
  • Mention fixed issues provided with the bundle.
Record
SUSE-FU-2022:0445-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openssl
Debian:12
 before 0.9.8c-2
0.9.8c-2
openssl
Debian:13
 before 0.9.8c-2
0.9.8c-2
openssl
Debian:14
 before 0.9.8c-2
0.9.8c-2
openssl
Debian:3.1
From an advisory covering 4 CVEs
 before 0.9.7e-3sarge4, plus listed versions
0.9.7e-30.9.7e-3sarge10.9.7e-3sarge20.9.7e-3sarge3
0.9.7e-3sarge4
openssl096
Debian:3.1
From an advisory covering 3 CVEs
 before 0.9.6m-1sarge4, plus listed versions
0.9.6m-10.9.6m-1sarge10.9.6m-1sarge2
0.9.6m-1sarge4
openssl
Red Hat:enterprise_linux:2.1::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-devel
Red Hat:enterprise_linux:2.1::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-perl
Red Hat:enterprise_linux:2.1::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl095a
Red Hat:enterprise_linux:2.1::as
From an advisory covering 4 CVEs
 before 0:0.9.5a-32
0:0.9.5a-32
openssl096
Red Hat:enterprise_linux:2.1::as
From an advisory covering 4 CVEs
 before 0:0.9.6-32
0:0.9.6-32
Show 69 moreShow less
Affected packages
PackageAffectedFixed
openssl
Red Hat:enterprise_linux:2.1::aw
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-devel
Red Hat:enterprise_linux:2.1::aw
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-perl
Red Hat:enterprise_linux:2.1::aw
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl095a
Red Hat:enterprise_linux:2.1::aw
From an advisory covering 4 CVEs
 before 0:0.9.5a-32
0:0.9.5a-32
openssl096
Red Hat:enterprise_linux:2.1::aw
From an advisory covering 4 CVEs
 before 0:0.9.6-32
0:0.9.6-32
openssl
Red Hat:enterprise_linux:2.1::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-devel
Red Hat:enterprise_linux:2.1::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-perl
Red Hat:enterprise_linux:2.1::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl
Red Hat:enterprise_linux:2.1::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-devel
Red Hat:enterprise_linux:2.1::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl-perl
Red Hat:enterprise_linux:2.1::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-46
0:0.9.6b-46
openssl
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-debuginfo
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-devel
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-perl
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl096b
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl096b-debuginfo
Red Hat:enterprise_linux:3::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-debuginfo
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-devel
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-perl
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl096b
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl096b-debuginfo
Red Hat:enterprise_linux:3::desktop
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-debuginfo
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-devel
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-perl
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl096b
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl096b-debuginfo
Red Hat:enterprise_linux:3::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-debuginfo
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-devel
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl-perl
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-33.21
0:0.9.7a-33.21
openssl096b
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl096b-debuginfo
Red Hat:enterprise_linux:3::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-16.46
0:0.9.6b-16.46
openssl
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-devel
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-perl
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl096b
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl096b-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-devel
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-perl
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl096b
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl096b-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-devel
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-perl
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl096b
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl096b-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-devel
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl-perl
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.7a-43.14
0:0.9.7a-43.14
openssl096b
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
openssl096b-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 4 CVEs
 before 0:0.9.6b-22.46
0:0.9.6b-22.46
rhn-solaris-bootstrap
Red Hat:network_satellite:5.0:el4
From an advisory covering 12 CVEs
 before 0:5.0.2-3
0:5.0.2-3
rhn_solaris_bootstrap_5_0_2_3
Red Hat:network_satellite:5.0:el4
From an advisory covering 12 CVEs
 before 0:1-0
0:1-0
rhn-solaris-bootstrap
Red Hat:network_satellite:4.2::el3
From an advisory covering 12 CVEs
 before 0:5.0.2-3
0:5.0.2-3
rhn_solaris_bootstrap_5_0_2_3
Red Hat:network_satellite:4.2::el3
From an advisory covering 12 CVEs
 before 0:1-0
0:1-0
rhn-solaris-bootstrap
Red Hat:network_satellite:4.2::el4
From an advisory covering 12 CVEs
 before 0:5.0.2-3
0:5.0.2-3
rhn_solaris_bootstrap_5_0_2_3
Red Hat:network_satellite:4.2::el4
From an advisory covering 12 CVEs
 before 0:1-0
0:1-0
rhn-solaris-bootstrap
Red Hat:network_satellite:5.1::el4
From an advisory covering 12 CVEs
 before 0:5.1.1-3
0:5.1.1-3
rhn_solaris_bootstrap_5_1_1_3
Red Hat:network_satellite:5.1::el4
From an advisory covering 12 CVEs
 before 0:1-0
0:1-0
openssl-1_0_0
openSUSE:Tumbleweed
From an advisory covering 29 CVEs
 before 1.0.2u-6.2
1.0.2u-6.2
openssl-1_1
openSUSE:Tumbleweed
From an advisory covering 136 CVEs
 before 1.1.1l-1.2
1.1.1l-1.2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2006-2940 is a high vulnerability (CVSS 7.8) in Openssl, published September 28, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.10%, the 92nd percentile. Fixed in openssl 0.9.8c-2.

References

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Left out here: 681 references. The JSON record has them.

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