CVE-2016-0800
MediumThe SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS…
Published Mar 1, 2016 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2016-0800, DROWN
Key Facts
Patch immediately- CVE-2016-0800 is a medium-severity vulnerability (CVSS 5.9 v3.1) affecting Openssl, Client (Pulsesecure), Steel Belted Radius (Pulsesecure) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 82% probability of exploitation in the next 30 days.
- Fixed versions are available, including compat-openssl097g 0.9.7g-146.22.41.1, compat-openssl097g-32bit 0.9.7g-146.22.41.1, compat-openssl098 0.9.8j-9.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.9
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
82%
Higher than 99.6% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2016-0800 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a "DROWN" attack.
Affected Products
281 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpensslOpenssl | 1.0.1, 1.0.1a, 1.0.1b, 1.0.1-beta1, 1.0.1-beta2, 1.0.1-beta3, 1.0.1c, 1.0.1d | 1.0.0c-2 |
| ClientPulsesecure | See advisory | n/a |
| Steel Belted RadiusPulsesecure | See advisory | n/a |
| nssdebian | See advisory | 3.13 |
| rootio-nssrootio | See advisory | 3.13 |
Patched Releases
compat-openssl097g
0.9.7g-146.22.41.1
compat-openssl097g-32bit
0.9.7g-146.22.41.1
compat-openssl098
0.9.8j-9.1, 0.9.8j-94.1
libopenssl-1_1-devel
1.1.1l-1.2
libopenssl-1_1-devel-32bit
1.1.1l-1.2
libopenssl-devel
0.9.8j-0.89.1, 0.9.8j-0.91.1, 1.0.1i-12.1, 1.0.1i-27.13.1, 1.0.1i-44.1, 1.0.1k-2.33.1, 1.0.1p-71.1, 1.0.2j-2.2
libopenssl-devel-32bit
1.0.1i-12.1, 1.0.1k-2.33.1, 1.0.1p-71.1, 1.0.2j-2.2
libopenssl0_9_8
0.9.8j-0.89.1, 0.9.8j-0.91.1, 0.9.8j-9.1, 0.9.8j-94.1, 0.9.8zh-14.1
libopenssl0_9_8-32bit
0.9.8j-0.89.1, 0.9.8j-0.91.1, 0.9.8j-9.1, 0.9.8j-94.1, 0.9.8zh-14.1
libopenssl0_9_8-hmac
0.9.8j-0.89.1, 0.9.8j-0.91.1
libopenssl0_9_8-hmac-32bit
0.9.8j-0.89.1, 0.9.8j-0.91.1
libopenssl0_9_8-x86
0.9.8j-0.89.1
libopenssl1_0_0
1.0.1g-0.40.1, 1.0.1i-12.1, 1.0.1i-27.13.1, 1.0.1i-44.1, 1.0.1k-2.33.1, 1.0.1p-71.1, 1.0.2j-2.2
libopenssl1_0_0-32bit
1.0.1g-0.40.1, 1.0.1i-12.1, 1.0.1i-27.13.1, 1.0.1i-44.1, 1.0.1k-2.33.1, 1.0.1p-71.1, 1.0.2j-2.2
libopenssl1_0_0-debuginfo
1.0.1k-2.33.1, 1.0.1p-71.1
libopenssl1_0_0-debuginfo-32bit
1.0.1k-2.33.1, 1.0.1p-71.1
libopenssl1_0_0-debuginfo-x86
1.0.1p-71.1
libopenssl1_0_0-hmac
1.0.1i-12.1, 1.0.1i-27.13.1, 1.0.1i-44.1, 1.0.1k-2.33.1, 1.0.2j-2.2
libopenssl1_0_0-hmac-32bit
1.0.1i-12.1, 1.0.1i-27.13.1, 1.0.1i-44.1, 1.0.1k-2.33.1, 1.0.2j-2.2
libopenssl1_0_0-steam
1.0.2h-4.1
libopenssl1_0_0-steam-32bit
1.0.2h-4.1
libopenssl1_0_0-x86
1.0.1g-0.40.1, 1.0.1p-71.1
libopenssl1_1
1.1.1l-1.2
libopenssl1_1-32bit
1.1.1l-1.2
libopenssl1_1-hmac
1.1.1l-1.2
Timeline
Publicly disclosed
Mar 1, 2016
Last updated
Aug 4, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- CWE-310
References
- advisoryRHSA-2016:0301
- advisoryRHSA-2016:0302
- advisoryRHSA-2016:0303
- advisoryRHSA-2016:0304
- advisoryRHSA-2016:0305
FAQ
Common Questions.
The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbac…
Affected: Openssl versions 1.0.1, 1.0.1a, 1.0.1b, 1.0.1-beta1, 1.0.1-beta2, 1.0.1-beta3, 1.0.1c, 1.0.1d; Client (Pulsesecure); Steel Belted Radius (Pulsesecure), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including compat-openssl097g 0.9.7g-146.22.41.1, compat-openssl097g-32bit 0.9.7g-146.22.41.1, compat-openssl098 0.9.8j-9.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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