CVE-2011-0738: MyProxy 5.0 through 5.2, as used in Globus Toolkit 5.0.0 through 5.0.2, does not properly verify the (1) hostn

Routine

MEDIUM 4.3DOWNGRADEDOWNGRADE

CVE-2011-0738 is a medium-severity flaw (CVSS 4.3) affecting myproxy, globus toolkit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MyProxy 5.0 through 5.2, as used in Globus Toolkit 5.0.0 through 5.0.2, does not properly verify the (1) hostname or (2) identity in the X.509 certificate for the myproxy-server, which allows remote attackers to spoof the server and conduct man-in-the-middle (MITM) attacks via a crafted certificate when executing (a) myproxy-logon or (b) myproxy-get-delegation.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-20
Published	2011-02-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: globus · ncsa

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

Am I affected?

Timeline

2011-02-02 01:00 UTCPublished CVE record published
2026-06-16 23:27 UTCUpdated Record last modified

ncsa myproxy DOWNGRADE

Affected: 5.0 · 5.1 · 5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy myproxy || rpm -q myproxy || myproxy --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison myproxy sudo apt install myproxy=<VERSION_BEFORE_5.0> sudo apt-mark hold myproxy

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

dnf --showduplicates list myproxy sudo dnf downgrade myproxy-<VERSION_BEFORE_5.0> sudo dnf versionlock add myproxy

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.

globus globus toolkit DOWNGRADE

Affected: 5.0.0 · 5.0.1 · 5.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.0

1. Check installed version

apt-cache policy globus-toolkit || rpm -q globus-toolkit || globus-toolkit --version

2. No fixed release: DOWNGRADE to a release before 5.0.0 (Debian / Ubuntu)

apt-cache madison globus-toolkit sudo apt install globus-toolkit=<VERSION_BEFORE_5.0.0> sudo apt-mark hold globus-toolkit

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

dnf --showduplicates list globus-toolkit sudo dnf downgrade globus-toolkit-<VERSION_BEFORE_5.0.0> sudo dnf versionlock add globus-toolkit

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-2011-0738?

myproxy: downgrade or apply the listed mitigation; globus toolkit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-0738 being exploited?

CVE-2011-0738 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-2011-0738 affect?

CVE-2011-0738 affects myproxy, globus toolkit. Severity is medium (CVSS 4.3). MyProxy 5.0 through 5.2, as used in Globus Toolkit 5.0.0 through 5.0.2, does not properly verify the (1) hostname or (2) identity in the X.509 certificate for the myproxy-server, which allows remote attackers to spoof the server and conduct

How urgent is CVE-2011-0738?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2004-2481 MEDIUM 4.6 DOWNGRADE MyProxy 6.58 allows remote authenticated users in the Users Tab to connect to arbitrary hosts from the MyProxy
CVE-2003-1199 MEDIUM 6.8 DOWNGRADE Cross-site scripting (XSS) vulnerability in MyProxy 20030629 allows remote attackers to inject arbitrary web s

References

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