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Fencer Intel
critical 9.8

CVE-2016-0799 in the critical feed json

The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, wh…

published 2016-03-03 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-0810

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
32.4%
EPSS 32.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.0.2g-1

debian advisories DEBIAN-CVE-2016-0799

  • openssl Ubuntu 14.04 LTS 1.0.1f-1ubuntu2.18
  • openssl Ubuntu 16.04 LTS 1.0.2g-1ubuntu2

ubuntu advisories UBUNTU-CVE-2016-0799

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl RHEL 6 1.0.1e-48.el6_8.1
  • openssl-perl RHEL 6 1.0.1e-48.el6_8.1
  • openssl RHEL 7 1:1.0.1e-51.el7_2.5
  • openssl-libs RHEL 7 1:1.0.1e-51.el7_2.5
  • openssl-perl RHEL 7 1:1.0.1e-51.el7_2.5
  • openssl RHEL 6.7 EUS 1.0.1e-42.el6_7.5
  • openssl-perl RHEL 6.7 EUS 1.0.1e-42.el6_7.5

red hat advisories RHSA-2016:2073RHSA-2016:0996RHSA-2016:0722

  • openssl OpenStack Cloud 5, Manager Proxy 2.1, Manager 2.1 0.9.8j-0.91.1
  • compat-openssl098 SLES for SAP 12 SP1, SLED 12 SP1, SLED 12 +1 more 0.9.8j-94.1
  • compat-openssl097g SLES for SAP 11 SP4, SLED 11 SP4 0.9.7g-146.22.41.1
  • openssl Studio Onsite 1.3, SLES for SAP 11 SP4, SLES 11 SP4 +5 more 0.9.8j-0.89.1
  • openssl SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 1.0.1i-44.1
  • openssl SLES for SAP 12, SLES 12, SLED 12 +1 more 1.0.1i-27.13.1
  • openssl1 SLES 11-SECURITY 1.0.1g-0.40.1

suse advisories SUSE-SU-2016:1057-1SUSE-SU-2016:0641-1SUSE-SU-2016:0631-1SUSE-SU-2016:0624-1SUSE-SU-2016:0620-1SUSE-SU-2016:0617-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-0799 updated cvss 2.6

OpenSSL: Fix memory issues in BIO_*printf functions

  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl098e Red Hat Enterprise Linux 7 openssl098e
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Core Services jbcs-httpd24-openssl
    affected: no fix available
  • Red Hat JBoss Enterprise Web Server 1 openssl Red Hat JBoss Enterprise Web Server 2 openssl
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Web Server 3 openssl
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Virtualization 3 rhev-hypervisor
    under investigation
  • Red Hat Enterprise Linux Client (v. 7) openssl 1.0.1e-51.el7_2.5, openssl-libs 1.0.1e-51.el7_2.5 Red Hat Enterprise Linux Client Optional (v. 7) openssl-perl 1.0.1e-51.el7_2.5 Red Hat Enterprise Linux ComputeNode (v. 7) openssl 1.0.1e-51.el7_2.5, openssl-libs 1.0.1e-51.el7_2.5 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-perl 1.0.1e-51.el7_2.5
    fixed: vendor fix RHSA-2016:0722
  • Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.1e-48.el6_8.1 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl-perl 1.0.1e-48.el6_8.1 Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) openssl 1.0.1e-42.el6_7.5
    fixed: vendor fix RHSA-2016:2073
show 13 more
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl-perl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) openssl-perl 1.0.1e-42.el6_7.5
    fixed: vendor fix RHSA-2016:2073
  • Red Hat Enterprise Linux Server (v. 6) openssl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux Server (v. 7) openssl 1.0.1e-51.el7_2.5, openssl-libs 1.0.1e-51.el7_2.5
    fixed: vendor fix RHSA-2016:0722
  • Red Hat Enterprise Linux Server EUS (v. 6.7) openssl 1.0.1e-42.el6_7.5
    fixed: vendor fix RHSA-2016:2073
  • Red Hat Enterprise Linux Server Optional (v. 6) openssl-perl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl 1.0.1e-51.el7_2.5
    fixed: vendor fix RHSA-2016:0722
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.7) openssl-perl 1.0.1e-42.el6_7.5
    fixed: vendor fix RHSA-2016:2073
  • Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux Workstation (v. 7) openssl 1.0.1e-51.el7_2.5, openssl-libs 1.0.1e-51.el7_2.5
    fixed: vendor fix RHSA-2016:0722
  • Red Hat Enterprise Linux Workstation Optional (v. 6) openssl-perl 1.0.1e-48.el6_8.1
    fixed: vendor fix RHSA-2016:0996
  • Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl 1.0.1e-51.el7_2.5
    fixed: vendor fix RHSA-2016:0722
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2016:2957

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-22-349-21 updated cvss 9.8

Siemens SCALANCE X-200RNA Switch Devices

  • Siemens SCALANCE X204RNA (HSR) (6GK5204-0BA00-2MB2) <V3.2.7 Siemens SCALANCE X204RNA (PRP) (6GK5204-0BA00-2KB2) <V3.2.7 Siemens SCALANCE X204RNA EEC (HSR) (6GK5204-0BS00-2NA3) <V3.2.7 Siemens SCALANCE X204RNA EEC (PRP) (6GK5204-0BS00-3LA3) <V3.2.7 Siemens SCALANCE X204RNA EEC (PRP/HSR) (6GK5204-0BS00-3PA3) <V3.2.7
    affected: fixed in V3.2.7, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

32.41% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.