0-byte record padding oracle
Noroxi assessment
Priority: Monitor (action score 28/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 17.1% (FIRST EPSS); higher than 97% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: openssl (Alpine:v3.6) 1.0.2r-r0; openssl (Debian:12) 1.1.0b-2; openssl (Debian:8) 1.0.1t-1+deb8u11.
Low priority for now. Upgrade to openssl (Alpine:v3.6) 1.0.2r-r0; openssl (Debian:12) 1.1.0b-2; openssl (Debian:8) 1.0.1t-1+deb8u11 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).
- BDU:2019-00985
- DLA-1701-1
- DSA-4400-1
- openSUSE-SU-2019:1105-1
- openSUSE-SU-2019:1432-1
- RHSA-2019:2304
- RHSA-2019:2437
- RHSA-2019:2439
- RHSA-2019:2471
- RHSA-2019:3929
- SUSE-SU-2019:0572-1
- SUSE-SU-2019:0600-1
- SUSE-SU-2019:0658-1
- SUSE-SU-2019:0803-1
- SUSE-SU-2019:0818-1
- SUSE-SU-2019:1362-1
- SUSE-SU-2019:14091-1
- SUSE-SU-2019:14092-1
- SUSE-SU-2019:1553-1
- SUSE-SU-2019:1608-1
- Published
- Feb 27, 2019
- Updated
- Jun 16, 2026
- EPSS
- 17.1% · 97th percentile
- CWE
- CWE-203
Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 17.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| openssl | openssl | cpe:2.3:a:openssl:openssl |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| netapp | active iq unified manager | cpe:2.3:a:netapp:active_iq_unified_manager |
| netapp | altavault | cpe:2.3:a:netapp:altavault |
| netapp | cloud backup | cpe:2.3:a:netapp:cloud_backup |
| netapp | clustered data ontap antivirus connector | cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector |
| netapp | element software | cpe:2.3:a:netapp:element_software |
| netapp | hci management node | cpe:2.3:a:netapp:hci_management_node |
| netapp | hyper converged infrastructure | cpe:2.3:a:netapp:hyper_converged_infrastructure |
| netapp | oncommand insight | cpe:2.3:a:netapp:oncommand_insight |
| netapp | oncommand unified manager | cpe:2.3:a:netapp:oncommand_unified_manager |
and 78 more
Check your server's TLS configuration
The OpenSSL version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.
Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- nodejs node.js8.0.0 and later · up to 8.8.1 inclusive
- nodejs node.js6.9.0 and later · before 6.17.0
- nodejs node.js6.0.0 and later · up to 6.8.1 inclusive
- nodejs node.js8.9.0 and later · before 8.15.1
- oracle mysql5.6.0 and later · up to 5.6.43 inclusive
- oracle mysql5.7.0 and later · up to 5.7.25 inclusive
- oracle mysql8.0.0 and later · up to 8.0.15 inclusive
- paloaltonetworks pan-os9.0.0 and later · before 9.0.2
- paloaltonetworks pan-os8.1.0 and later · before 8.1.8
- paloaltonetworks pan-os8.0.0 and later · before 8.0.20
- paloaltonetworks pan-os7.1.0 and later · before 7.1.15
Versions reported by the vendor
Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.
OpenSSL OpenSSL
- Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q)affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.6 | openssl | from 1.0.2 · before 1.0.2r-r0 | 1.0.2r-r0 |
| Debian:12 | openssl | before 1.1.0b-2 | 1.1.0b-2 |
| Debian:8 | openssl | before 1.0.1t-1+deb8u11 | 1.0.1t-1+deb8u11 |
| Debian:9 | openssl1.0 | before 1.0.2r-1~deb9u1 | 1.0.2r-1~deb9u1 |
| openSUSE:Leap 15.0 | openssl-1_0_0 | before 1.0.2p-lp150.2.13.1 | 1.0.2p-lp150.2.13.1 |
| openSUSE:Leap 15.1 | openssl-1_0_0 | before 1.0.2p-lp151.5.3.1 | 1.0.2p-lp151.5.3.1 |
| Red Hat:enterprise_linux:6::client | openssl | before 0:1.0.1e-58.el6_10 | 0:1.0.1e-58.el6_10 |
| Red Hat:enterprise_linux:6::client | openssl-debuginfo | before 0:1.0.1e-58.el6_10 | 0:1.0.1e-58.el6_10 |
| Red Hat:enterprise_linux:6::client | openssl-devel | before 0:1.0.1e-58.el6_10 | 0:1.0.1e-58.el6_10 |
| Red Hat:enterprise_linux:6::client | openssl-perl | before 0:1.0.1e-58.el6_10 | 0:1.0.1e-58.el6_10 |
| Red Hat:enterprise_linux:6::client | openssl-static | before 0:1.0.1e-58.el6_10 | 0:1.0.1e-58.el6_10 |
| Red Hat:enterprise_linux:7::client | openssl | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::client | openssl-debuginfo | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::client | openssl-devel | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::client | openssl-libs | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::client | openssl-perl | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::client | openssl-static | before 1:1.0.2k-19.el7 | 1:1.0.2k-19.el7 |
| Red Hat:enterprise_linux:7::hypervisor | imgbased | before 0:1.1.9-0.1.el7ev | 0:1.1.9-0.1.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | ovirt-node-ng | before 0:4.3.5-0.20190717.0.el7ev | 0:4.3.5-0.20190717.0.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | ovirt-node-ng-nodectl | before 0:4.3.5-0.20190717.0.el7ev | 0:4.3.5-0.20190717.0.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | python-imgbased | before 0:1.1.9-0.1.el7ev | 0:1.1.9-0.1.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | python2-ovirt-node-ng-nodectl | before 0:4.3.5-0.20190717.0.el7ev | 0:4.3.5-0.20190717.0.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | redhat-release-virtualization-host | before 0:4.3.5-2.el7ev | 0:4.3.5-2.el7ev |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host | before 0:4.3.5-20190722.0.el7_7 | 0:4.3.5-20190722.0.el7_7 |
+73
Same product
openssl: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV90Now
- CVE-2021-3711SM2 Decryption Buffer Overflow65This week
- CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code 65This week
Published before and after this one in the same product
- ← EarlierCVE-2018-0735Oct 29, 2018 · Timing attack against ECDSA signature generation24Monitor
- ← EarlierCVE-2018-0734Oct 30, 2018 · Timing attack against DSA27Monitor
- Later →CVE-2019-1543Mar 6, 2019 · ChaCha20-Poly1305 with long nonces31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:openssl | 1.0.2r-r0 · Alpine:v3.6 | Package registry (OSV) |
| debian:openssl | 1.1.0b-2 · Debian:12 | Package registry (OSV) |
| debian:openssl1.0 | 1.0.2r-1~deb9u1 · Debian:9 | Package registry (OSV) |
| opensuse:openssl-1_0_0 | 1.0.2p-lp150.2.13.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:imgbased | 0:1.1.9-0.1.el7ev · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:openssl | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-debuginfo | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-devel | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-libs | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-perl | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:openssl-static | 1:1.0.2k-19.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:ovirt-node-ng | 0:4.3.5-0.20190717.0.el7ev · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:ovirt-node-ng-nodectl | 0:4.3.5-0.20190717.0.el7ev · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:python-imgbased | 0:1.1.9-0.1.el7ev · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:redhat-virtualization-host | 0:4.3.5-20190722.0.el7_7 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:redhat-virtualization-host-image-update | 0:4.3.5-20190722.0.el7_7 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| suse:compat-openssl098 | 0.9.8j-106.12.1 · SUSE:Linux Enterprise Desktop 12 SP3 | Package registry (OSV) |
| suse:nodejs4 | 4.9.1-15.20.1 · SUSE:Linux Enterprise Module for Web and Scripting 12 | Package registry (OSV) |
| suse:nodejs6 | 6.17.0-11.24.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:openssl | 1.0.2j-60.49.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:openssl-1_0_0 | 1.0.2p-3.6.1 · SUSE:Linux Enterprise Desktop 12 SP4 | Package registry (OSV) |
| suse:openssl1 | 1.0.1g-0.58.18.1 · SUSE:Linux Enterprise Server 11-SECURITY | Package registry (OSV) |
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.
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 researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Juraj Somorovsky, Robert Merget and Nimrod Aviram,additional investigation by Steven Collison and Andrew Hourselt
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.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-203 · Observable DiscrepancyCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- usn.ubuntu.com/4376-2/
- support.f5.com/csp/article/K18549143?utm_source=f5support&%3Butm_medium=RSS
- lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00019.html
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00047.html
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00049.html
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00080.html
- www.securityfocus.com/bid/107174
- access.redhat.com/errata/RHSA-2019:2304
- access.redhat.com/errata/RHSA-2019:2437
- access.redhat.com/errata/RHSA-2019:2439
- access.redhat.com/errata/RHSA-2019:2471
- access.redhat.com/errata/RHSA-2019:3929
- access.redhat.com/errata/RHSA-2019:3931
- git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e9bbefbf0f24c57645e7ad6a5a71ae649d18ac8e
- kc.mcafee.com/corporate/index?page=content&id=SB10282
- lists.debian.org/debian-lts-announce/2019/03/msg00003.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.