Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

Published : 2019-09-10 17:15 Updated : 2019-09-12 16:15

CVSS Score More info
Score 1.9 / 10
Vendor Product Version URI
Openssl Openssl 1.0.2 cpe:/a:openssl:openssl:1.0.2
Openssl Openssl 1.0.2 cpe:/a:openssl:openssl:1.0.2:beta1
Openssl Openssl 1.0.2 cpe:/a:openssl:openssl:1.0.2:beta2
Openssl Openssl 1.0.2 cpe:/a:openssl:openssl:1.0.2:beta3
Openssl Openssl 1.0.2a cpe:/a:openssl:openssl:1.0.2a
Openssl Openssl 1.0.2b cpe:/a:openssl:openssl:1.0.2b
Openssl Openssl 1.0.2c cpe:/a:openssl:openssl:1.0.2c
Openssl Openssl 1.0.2d cpe:/a:openssl:openssl:1.0.2d
Openssl Openssl 1.0.2e cpe:/a:openssl:openssl:1.0.2e
Openssl Openssl 1.0.2f cpe:/a:openssl:openssl:1.0.2f
Openssl Openssl 1.0.2g cpe:/a:openssl:openssl:1.0.2g
Openssl Openssl 1.0.2h cpe:/a:openssl:openssl:1.0.2h
Openssl Openssl 1.0.2i cpe:/a:openssl:openssl:1.0.2i
Openssl Openssl 1.0.2j cpe:/a:openssl:openssl:1.0.2j
Openssl Openssl 1.0.2k cpe:/a:openssl:openssl:1.0.2k
Openssl Openssl 1.0.2l cpe:/a:openssl:openssl:1.0.2l
Openssl Openssl 1.0.2m cpe:/a:openssl:openssl:1.0.2m
Openssl Openssl 1.0.2n cpe:/a:openssl:openssl:1.0.2n
Openssl Openssl 1.0.2o cpe:/a:openssl:openssl:1.0.2o
Openssl Openssl 1.0.2p cpe:/a:openssl:openssl:1.0.2p
Openssl Openssl 1.0.2q cpe:/a:openssl:openssl:1.0.2q
Openssl Openssl 1.0.2r cpe:/a:openssl:openssl:1.0.2r
Openssl Openssl 1.0.2s cpe:/a:openssl:openssl:1.0.2s
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:-
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre1
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre2
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre3
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre4
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre5
Openssl Openssl 1.1.0 cpe:/a:openssl:openssl:1.1.0:pre6
Openssl Openssl 1.1.0a cpe:/a:openssl:openssl:1.1.0a
Openssl Openssl 1.1.0b cpe:/a:openssl:openssl:1.1.0b
Openssl Openssl 1.1.0c cpe:/a:openssl:openssl:1.1.0c
Openssl Openssl 1.1.0d cpe:/a:openssl:openssl:1.1.0d
Openssl Openssl 1.1.0e cpe:/a:openssl:openssl:1.1.0e
Openssl Openssl 1.1.0f cpe:/a:openssl:openssl:1.1.0f
Openssl Openssl 1.1.0g cpe:/a:openssl:openssl:1.1.0g
Openssl Openssl 1.1.0h cpe:/a:openssl:openssl:1.1.0h
Openssl Openssl 1.1.0i cpe:/a:openssl:openssl:1.1.0i
Openssl Openssl 1.1.0j cpe:/a:openssl:openssl:1.1.0j
Openssl Openssl 1.1.0k cpe:/a:openssl:openssl:1.1.0k
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre1
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre2
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre3
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre4
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre5
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre6
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre7
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre8
Openssl Openssl 1.1.1 cpe:/a:openssl:openssl:1.1.1:pre9
Openssl Openssl 1.1.1a cpe:/a:openssl:openssl:1.1.1a
Openssl Openssl 1.1.1b cpe:/a:openssl:openssl:1.1.1b
Openssl Openssl 1.1.1c cpe:/a:openssl:openssl:1.1.1c
  1. Openssl (1) Search CVE
    1. Openssl (36) Search CVE
      1. 1.0.2
      2. 1.0.2a
      3. 1.0.2b
      4. 1.0.2c
      5. 1.0.2d
      6. 1.0.2e
      7. 1.0.2f
      8. 1.0.2g
      9. 1.0.2h
      10. 1.0.2i
      11. 1.0.2j
      12. 1.0.2k
      13. 1.0.2l
      14. 1.0.2m
      15. 1.0.2n
      16. 1.0.2o
      17. 1.0.2p
      18. 1.0.2q
      19. 1.0.2r
      20. 1.0.2s
      21. 1.1.0
      22. 1.1.0a
      23. 1.1.0b
      24. 1.1.0c
      25. 1.1.0d
      26. 1.1.0e
      27. 1.1.0f
      28. 1.1.0g
      29. 1.1.0h
      30. 1.1.0i
      31. 1.1.0j
      32. 1.1.0k
      33. 1.1.1
      34. 1.1.1a
      35. 1.1.1b
      36. 1.1.1c


ID Name Description Links
CWE-311 Missing Encryption of Sensitive Data The software does not encrypt sensitive or critical information before storage or transmission. CVE

History of changes

Date Event
2019-09-12 16:15
2019-09-12 13:23
2019-09-10 17:35