PatchTheCVECVE-2015-3195: The ASN1_TFLG_COMBINE implementation in crypto/asn1/tasn_dec.c in OpenSSL before 0.9.8zh, 1.0.0 before 1.0.0t,
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MEDIUM 5.3REMOTEWATCHLISTUPGRADEDOWNGRADEDOWNGRADE
CVE-2015-3195 is a medium-severity flaw (CVSS 5.3) affecting mac os x, api gateway, communications webrtc session controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The ASN1_TFLG_COMBINE implementation in crypto/asn1/tasn_dec.c in OpenSSL before 0.9.8zh, 1.0.0 before 1.0.0t, 1.0.1 before 1.0.1q, and 1.0.2 before 1.0.2e mishandles errors caused by malformed X509_ATTRIBUTE data, which allows remote attackers to obtain sensitive information from process memory by triggering a decoding failure in a PKCS#7 or CMS application.
Why this priority
- EPSS top 1%: very likely to be exploited
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 38.7% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-200 |
| Published | 2015-12-06 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
apple mac os x UPGRADE
Affected: < 10.11.4
Fixed in: 10.11.4
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
oracle api gateway DOWNGRADE
Affected: 11.1.2.3.0 · 11.1.2.4.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.1.2.3.0
1. Check installed version
apt-cache policy api-gateway || rpm -q api-gateway || api-gateway --version
2. No fixed release: DOWNGRADE to a release before 11.1.2.3.0 (Debian / Ubuntu)
apt-cache madison api-gateway
sudo apt install api-gateway=<VERSION_BEFORE_11.1.2.3.0>
sudo apt-mark hold api-gateway
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list api-gateway
sudo dnf downgrade api-gateway-<VERSION_BEFORE_11.1.2.3.0>
sudo dnf versionlock add api-gateway
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle communications webrtc session controller DOWNGRADE
Affected: 7.0 · 7.1 · 7.2
Fixed in: no fixed release known
Safe to downgrade to: a release before 7.0
1. Check installed version
apt-cache policy communications-webrtc-session-controller || rpm -q communications-webrtc-session-controller || communications-webrtc-session-controller --version
2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)
apt-cache madison communications-webrtc-session-controller
sudo apt install communications-webrtc-session-controller=<VERSION_BEFORE_7.0>
sudo apt-mark hold communications-webrtc-session-controller
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list communications-webrtc-session-controller
sudo dnf downgrade communications-webrtc-session-controller-<VERSION_BEFORE_7.0>
sudo dnf versionlock add communications-webrtc-session-controller
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle exalogic infrastructure DOWNGRADE
Affected: 1.0 · 2.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.0
1. Check installed version
apt-cache policy exalogic-infrastructure || rpm -q exalogic-infrastructure || exalogic-infrastructure --version
2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)
apt-cache madison exalogic-infrastructure
sudo apt install exalogic-infrastructure=<VERSION_BEFORE_1.0>
sudo apt-mark hold exalogic-infrastructure
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list exalogic-infrastructure
sudo dnf downgrade exalogic-infrastructure-<VERSION_BEFORE_1.0>
sudo dnf versionlock add exalogic-infrastructure
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle http server DOWNGRADE
Affected: 11.5.10.2
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.5.10.2
1. Check installed version
apt-cache policy http-server || rpm -q http-server || http-server --version
2. No fixed release: DOWNGRADE to a release before 11.5.10.2 (Debian / Ubuntu)
apt-cache madison http-server
sudo apt install http-server=<VERSION_BEFORE_11.5.10.2>
sudo apt-mark hold http-server
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list http-server
sudo dnf downgrade http-server-<VERSION_BEFORE_11.5.10.2>
sudo dnf versionlock add http-server
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
oracle life sciences data hub DOWNGRADE
Affected: 2.1
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.1
1. Check installed version
apt-cache policy life-sciences-data-hub || rpm -q life-sciences-data-hub || life-sciences-data-hub --version
2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)
apt-cache madison life-sciences-data-hub
sudo apt install life-sciences-data-hub=<VERSION_BEFORE_2.1>
sudo apt-mark hold life-sciences-data-hub
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list life-sciences-data-hub
sudo dnf downgrade life-sciences-data-hub-<VERSION_BEFORE_2.1>
sudo dnf versionlock add life-sciences-data-hub
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2015-3195?
mac os x: upgrade to 10.11.4; api gateway: downgrade or apply the listed mitigation; communications webrtc session controller: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2015-3195 being exploited?
CVE-2015-3195 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2015-3195 affect?
CVE-2015-3195 affects mac os x, api gateway, communications webrtc session controller. Severity is medium (CVSS 5.3). The ASN1_TFLG_COMBINE implementation in crypto/asn1/tasn_dec.c in OpenSSL before 0.9.8zh, 1.0.0 before 1.0.0t, 1.0.1 before 1.0.1q, and 1.0.2 before 1.0.2e mishandles errors caused by malformed X509_ATTRIBUTE data, which allows remote attac
How urgent is CVE-2015-3195?
Priority 53/100. EPSS top 1%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist
Software pages
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