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CVE-2020-11733: An issue was discovered on Spirent TestCenter and Avalanche appliance admin interface firmware

42
This month
MEDIUM 6.7UPGRADEUPGRADE

CVE-2020-11733 is a medium-severity flaw (CVSS 6.7) affecting avalanche, testcenter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on Spirent TestCenter and Avalanche appliance admin interface firmware. An attacker, who already has access to an SSH restricted shell, can achieve root access via shell metacharacters. The attacker can then, for example, read sensitive files such as appliance admin configuration source code. This affects Spirent TestCenter and Avalanche products which chassis version <= 5.08. The SSH restricted shell is available with def

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.7 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededHigh
User interactionNone
EPSS exploit chance1.6% (top 25%)
CISA exploited listNo
WeaknessCWE-78
Published2020-08-13
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: spirent

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

spirent avalanche UPGRADE
Affected: <= 5.08
Fixed in: newer than 5.08
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy avalanche || rpm -q avalanche || avalanche --version
2. UPGRADE to newer than 5.08 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade avalanche
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade avalanche
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
spirent testcenter UPGRADE
Affected: <= 5.08
Fixed in: newer than 5.08
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy testcenter || rpm -q testcenter || testcenter --version
2. UPGRADE to newer than 5.08 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade testcenter
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade testcenter
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
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-2020-11733?

avalanche: upgrade to newer than 5.08; testcenter: upgrade to newer than 5.08. Exact commands for each OS are on this page.

Is CVE-2020-11733 being exploited?

CVE-2020-11733 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-2020-11733 affect?

CVE-2020-11733 affects avalanche, testcenter. Severity is medium (CVSS 6.7). An issue was discovered on Spirent TestCenter and Avalanche appliance admin interface firmware. An attacker, who already has access to an SSH restricted shell, can achieve root access via shell metacharacters. The attacker can then, for exa

How urgent is CVE-2020-11733?

Priority 42/100. No elevated risk signals yet.

Related CVEs

References

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