Description
Integer underflow in the EVP_DecodeUpdate function in crypto/evp/encode.c in the base64-decoding implementation in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via crafted base64 data that triggers a buffer overflow.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.0.1h-1 | — |
| Debian 13 | openssl | 1.0.1h-1 | — |
| Debian 12 | openssl | 1.0.1h-1 | — |
| Debian 7 | openssl | 1.0.1e-2+deb7u15 | DSA-3197-1 |
| Debian 6.0 | openssl | 0.9.8o-4squeeze20 | DLA-177-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.11 | USN-2537-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.1e-42.ael7b_1.4 | RHSA-2015:0716 |
| RHEL 6 | openssl +3 | 1.0.1e-30.el6_6.7 | RHSA-2015:0715 |
| RHEL 5 | openssl +2 | 0.9.8e-33.el5_11 | RHSA-2015:0800 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 2 | openssl +3 | 1.0.1e-30.el6_6.7 | RHSA-2015:0752 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 SP1 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 | compat-openssl098 | 0.9.8j-73.2 | SUSE-SU-2015:0553-2, SUSE-SU-2015:0553-1 |
| SLES 12 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES 12 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 SP1 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 | libqt4 +1 | 4.8.6-7.1 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
| SLES for SAP 12 | libqt4-devel-doc | 4.8.6-7.3 | SUSE-SU-403 Forbidden-1, SUSE-SU-403 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl +4 | 1:1.0.1e-42.el7_1.4 | ELSA-2015-0716 |
Advisories 15
- RHSA-2015:0752 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:0715 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:0716 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:0800 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-2537-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-177-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3197-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:0553-2 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-403 Forbidden-1 Security update for OpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0553-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-403 Security update for OpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- ICSA-22-349-21 Siemens SCALANCE X-200RNA Switch Devices CISA ICS & IT advisories · Dec 13, 2022
- SSA-412672 SSA-412672: Multiple OpenSSL and OpenSSH Vulnerabilities in SCALANCE X-200RNA Switch Devices before V3.2.7 Siemens ProductCERT · Dec 13, 2022
- ELSA-2015-0716 Moderate: openssl security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 23, 2015
References
- https://kc.mcafee.com/corporate/index?page=content&id=SB10110
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- RHSA-2015:0715 vendor-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10680
- DSA-3197 vendor-advisory
- USN-2537-1 vendor-advisory
- HPSBMU03409 vendor-advisory
- FEDORA-2015-4303 vendor-advisory
- https://bto.bluecoat.com/security-advisory/sa92
- https://www.openssl.org/news/secadv_20150319.txt
- https://rt.openssl.org/Ticket/Display.html?id=2608&user=guest&pass=guest
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- HPSBMU03380 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- FEDORA-2015-4300 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1202395
- https://access.redhat.com/articles/1384453
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- 73228 vdb-entry
- HPSBUX03334 vendor-advisory
- http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- RHSA-2015:0716 vendor-advisory
- SUSE-SU-2015:0578 vendor-advisory
- HPSBMU03397 vendor-advisory
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=d0666f289ac013094bbbf547bfbcd616199b7d2d
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
- RHSA-2015:0752 vendor-advisory
- RHSA-2015:0800 vendor-advisory
- 1031929 vdb-entry
- FEDORA-2015-4320 vendor-advisory
- https://support.citrix.com/article/CTX216642
- GLSA-201503-11 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf