CVE-2011-4134: Heap-based buffer overflow in lmadmin in Flexera FlexNet Publisher 11.10 (aka FlexNet License Server Manager)

This month

HIGH 10.0DOWNGRADE

CVE-2011-4134 is a high-severity flaw (CVSS 10.0) affecting flexnet publisher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in lmadmin in Flexera FlexNet Publisher 11.10 (aka FlexNet License Server Manager) allows remote attackers to execute arbitrary code via a crafted 0x2f packet.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Weakness	CWE-119
Published	2012-01-19
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: flexerasoftware

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-01-19 19:55 UTCPublished CVE record published
2026-06-16 23:34 UTCUpdated Record last modified

flexerasoftware flexnet publisher DOWNGRADE

Affected: 11.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.10

1. Check installed version

apt-cache policy flexnet-publisher || rpm -q flexnet-publisher || flexnet-publisher --version

2. No fixed release: DOWNGRADE to a release before 11.10 (Debian / Ubuntu)

apt-cache madison flexnet-publisher sudo apt install flexnet-publisher=<VERSION_BEFORE_11.10> sudo apt-mark hold flexnet-publisher

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flexnet-publisher sudo dnf downgrade flexnet-publisher-<VERSION_BEFORE_11.10> sudo dnf versionlock add flexnet-publisher

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.

Quick answers

How do I fix CVE-2011-4134?

flexnet publisher: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-4134 being exploited?

CVE-2011-4134 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-2011-4134 affect?

CVE-2011-4134 affects flexnet publisher. Severity is high (CVSS 10.0). Heap-based buffer overflow in lmadmin in Flexera FlexNet Publisher 11.10 (aka FlexNet License Server Manager) allows remote attackers to execute arbitrary code via a crafted 0x2f packet.

How urgent is CVE-2011-4134?

Priority 58/100. Critical severity; EPSS top 8%: very likely to be exploited

Related CVEs

CVE-2020-12081 HIGH 7.5 DOWNGRADE An information disclosure vulnerability has been identified in FlexNet Publisher lmadmin.exe 11.14.0.2
CVE-2020-12080 HIGH 7.5 DOWNGRADE A Denial of Service vulnerability has been identified in FlexNet Publisher's lmadmin.exe version 11.16.6
CVE-2019-8963 HIGH 7.5 DOWNGRADE A Denial of Service (DoS) vulnerability was discovered in FlexNet Publisher's lmadmin 11.16.5, when doing a cr
CVE-2019-8961 HIGH 7.5 DOWNGRADE A Denial of Service vulnerability related to stack exhaustion has been identified in FlexNet Publisher lmadmin
CVE-2019-8960 HIGH 7.5 DOWNGRADE A Denial of Service vulnerability related to command handling has been identified in FlexNet Publisher lmadmin

References

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