CVE-2003-0452: Buffer overflows in osh before 1.7-11 allow local users to execute arbitrary code and bypass shell restriction

Q: How do I fix CVE-2003-0452?

osh: upgrade to newer than 1.7-10. Exact commands for each OS are on this page.

Q: Is CVE-2003-0452 being exploited?

CVE-2003-0452 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2003-0452 affect?

CVE-2003-0452 affects osh. Severity is medium (CVSS 4.6). Buffer overflows in osh before 1.7-11 allow local users to execute arbitrary code and bypass shell restrictions via (1) long environment variables or (2) long "file redirections."

Q: How urgent is CVE-2003-0452?

Priority 25/100. No elevated risk signals yet.

Routine

MEDIUM 4.6UPGRADE

CVE-2003-0452 is a medium-severity flaw (CVSS 4.6) affecting osh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflows in osh before 1.7-11 allow local users to execute arbitrary code and bypass shell restrictions via (1) long environment variables or (2) long "file redirections."

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Published	2003-08-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gunnar ritter

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

Am I affected?

Timeline

2003-08-07 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

gunnar ritter osh UPGRADE

Affected: <= 1.7-10

Fixed in: newer than 1.7-10

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.7-10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade osh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade osh

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-2003-0452?

osh: upgrade to newer than 1.7-10. Exact commands for each OS are on this page.

Is CVE-2003-0452 being exploited?

CVE-2003-0452 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-2003-0452 affect?

CVE-2003-0452 affects osh. Severity is medium (CVSS 4.6). Buffer overflows in osh before 1.7-11 allow local users to execute arbitrary code and bypass shell restrictions via (1) long environment variables or (2) long "file redirections."

How urgent is CVE-2003-0452?

Priority 25/100. No elevated risk signals yet.

Related CVEs

CVE-2005-3533 HIGH 7.2 UPGRADE Buffer overflow in OSH before 1.7-15 allows local users to execute arbitrary code via a long current working d
CVE-2005-3346 HIGH 7.2 DOWNGRADE Buffer overflow in the environment variable substitution code in main.c in OSH 1.7-14 allows local users to in

References

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