CVE-2020-25843: NHIServiSignAdapter fails to verify the length of digital credential files’ path which leads to a heap overflo

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HIGH 8.1REMOTEDOWNGRADE

CVE-2020-25843 is a high-severity flaw (CVSS 8.1) affecting nhiservisignadapter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NHIServiSignAdapter fails to verify the length of digital credential files’ path which leads to a heap overflow loophole. Remote attackers can use the leak to execute code without privilege.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-122, CWE-787
Published	2020-12-31
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: panorama

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

Am I affected?

Timeline

2020-12-31 08:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

panorama nhiservisignadapter DOWNGRADE

Affected: 1.0.20.0218

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.20.0218

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.20.0218 (Debian / Ubuntu)

apt-cache madison nhiservisignadapter sudo apt install nhiservisignadapter=<VERSION_BEFORE_1.0.20.0218> sudo apt-mark hold nhiservisignadapter

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

dnf --showduplicates list nhiservisignadapter sudo dnf downgrade nhiservisignadapter-<VERSION_BEFORE_1.0.20.0218> sudo dnf versionlock add nhiservisignadapter

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-2020-25843?

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

Is CVE-2020-25843 being exploited?

CVE-2020-25843 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-2020-25843 affect?

CVE-2020-25843 affects nhiservisignadapter. Severity is high (CVSS 8.1). NHIServiSignAdapter fails to verify the length of digital credential files’ path which leads to a heap overflow loophole. Remote attackers can use the leak to execute code without privilege.

How urgent is CVE-2020-25843?

Priority 53/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-25846 HIGH 7.5 DOWNGRADE The digest generation function of NHIServiSignAdapter has not been verified for source file path, which leads
CVE-2020-25845 HIGH 7.5 DOWNGRADE Multiple functions of NHIServiSignAdapter failed to verify the users’ file path, which leads to the SMB reques
CVE-2020-25844 HIGH 8.1 DOWNGRADE The digest generation function of NHIServiSignAdapter has not been verified for parameter’s length, which lead
CVE-2020-25842 HIGH 7.5 DOWNGRADE The encryption function of NHIServiSignAdapter fail to verify the file path input by users

References

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