CVE-2016-2850
published 2016-05-13CVE-2016-2850: Botan 1.11.x before 1.11.29 does not enforce TLS policy for (1) signature algorithms and (2) ECC curves, which allows remote attackers to conduct downgrade…
PriorityP339high7.5CVSS 3.0
AVNACLPRNUINSUCNIHAN
EPSS
2.12%
79.8th percentile
Botan 1.11.x before 1.11.29 does not enforce TLS policy for (1) signature algorithms and (2) ECC curves, which allows remote attackers to conduct downgrade attacks via unspecified vectors.
Affected
30 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
| botan_project | botan | — | — |
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
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Bugzilla
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [epel-all]
bugzilla·2016-04-27·CVSS 7.5
CVE-2016-2849 [HIGH] CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [epel-all]
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of
Bugzilla
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [fedora-all]
bugzilla·2016-04-27·CVSS 7.5
CVE-2016-2849 [HIGH] CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [fedora-all]
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29 [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fe
Bugzilla
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29
bugzilla·2016-04-27·CVSS 7.5
CVE-2016-2849 [HIGH] CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29
CVE-2016-2849 CVE-2016-2850 botan: two issues fixed in 1.11.29
The following issues were fixed in the 1.11.29 release of botan:
(CVE-2016-2849): ECDSA side channel
ECDSA (and DSA) signature algorithms perform a modular inverse on the signature nonce k. The modular inverse algorithm used had input dependent loops, and it is possible a side channel attack could recover sufficient information about the nonce to eventually recover the ECDSA secret key. Found by Sean Devlin.
Introduced in 1.7.15, fixed in 1.11.29
2016-03-17 (CVE-2016-2850): Failure to enforce TLS policy
TLS v1.2 allows negotiating which signature algorithms and hash functions each side is willing to accept. However received signatures were not actually checked against the specified policy. This had the effect of allowing
http://botan.randombit.net/security.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.htmlhttp://marc.info/?l=botan-devel&m=145852488622892&w=2https://security.gentoo.org/glsa/201701-23http://botan.randombit.net/security.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.htmlhttp://marc.info/?l=botan-devel&m=145852488622892&w=2https://security.gentoo.org/glsa/201701-23
2016-05-13
Published