CVE-2013-0162: The diff_pp function in lib/gauntlet_rubyparser.rb in the ruby_parser gem 3.1.1 and earlier for Ruby allows lo

Q: How do I fix CVE-2013-0162?

ruby parser: upgrade to newer than 3.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2013-0162 being exploited?

CVE-2013-0162 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-2013-0162 affect?

CVE-2013-0162 affects ruby parser. Severity is low (CVSS 2.1). The diff_pp function in lib/gauntlet_rubyparser.rb in the ruby_parser gem 3.1.1 and earlier for Ruby allows local users to overwrite arbitrary files via a symlink attack on a temporary file with a predictable name in /tmp.

Q: How urgent is CVE-2013-0162?

Priority 15/100. No elevated risk signals yet.

Routine

LOW 2.1UPGRADE

CVE-2013-0162 is a low-severity flaw (CVSS 2.1) affecting ruby parser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The diff_pp function in lib/gauntlet_rubyparser.rb in the ruby_parser gem 3.1.1 and earlier for Ruby allows local users to overwrite arbitrary files via a symlink attack on a temporary file with a predictable name in /tmp.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-264
Published	2013-03-01
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: ryan davis

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

Am I affected?

Timeline

2013-03-01 05:40 UTCPublished CVE record published
2026-06-16 23:48 UTCUpdated Record last modified

ryan davis ruby parser UPGRADE

Affected: <= 3.1.1 · 1.0.0 · 2.0.0 · 2.0.1 · 2.0.2 · 2.0.3 · 2.0.4 · 2.0.5

Fixed in: newer than 3.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ruby-parser || rpm -q ruby-parser || ruby-parser --version

2. UPGRADE to newer than 3.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ruby-parser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ruby-parser

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-2013-0162?

ruby parser: upgrade to newer than 3.1.1. Exact commands for each OS are on this page.

Is CVE-2013-0162 being exploited?

CVE-2013-0162 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-2013-0162 affect?

CVE-2013-0162 affects ruby parser. Severity is low (CVSS 2.1). The diff_pp function in lib/gauntlet_rubyparser.rb in the ruby_parser gem 3.1.1 and earlier for Ruby allows local users to overwrite arbitrary files via a symlink attack on a temporary file with a predictable name in /tmp.

How urgent is CVE-2013-0162?

Priority 15/100. No elevated risk signals yet.

Software pages

Ruby vulnerabilities

References

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