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CVE-2016-2850· NVD / CVE Program· CNA mitre

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 co

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.

HighCVSS 7.5 · v3.0—No exploit No fix recorded
Published
May 13, 2016
Updated
Jun 16, 2026
EPSS
2.1% · 81th percentile
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Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.1%

Affected systems

VendorProduct
fedoraprojectfedora
botan projectbotan

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • botan project botan1.11.0
  • botan project botan1.11.1
  • botan project botan1.11.10
  • botan project botan1.11.11
  • botan project botan1.11.12
  • botan project botan1.11.13
  • botan project botan1.11.14
  • botan project botan1.11.15
  • botan project botan1.11.16
  • botan project botan1.11.17
  • botan project botan1.11.18
  • botan project botan1.11.19
  • botan project botan1.11.2
  • botan project botan1.11.20
  • botan project botan1.11.21
  • botan project botan1.11.22
  • botan project botan1.11.23
  • botan project botan1.11.24
  • botan project botan1.11.25
  • botan project botan1.11.26

Same product

fedoraproject: all records

Other highest-scoring records for the same primary product.

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    59Plan
  • CVE-2024-24576Rusts's `std::process::Command` did not properly escape arguments of batch files on Windows
    46Plan
  • CVE-2016-7167Multiple integer overflows in the (1) curl_escape, (2) curl_easy_escape, (3) curl_unescape, and (4) curl_easy_unescape functions in libcurl
    43Plan
  • CVE-2016-2173org.springframework.core.serializer.DefaultDeserializer in Spring AMQP before 1.5.5 allows remote attackers to execute arbitrary code.
    41Plan
  • CVE-2015-0278libuv before 0.10.34 does not properly drop group privileges, which allows context-dependent attackers to gain privileges via unspecified ve
    41Plan
  • CVE-2015-3145The sanitize_cookie_path function in cURL and libcurl 7.31.0 through 7.41.0 does not properly calculate an index, which allows remote attack
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records