CVE-2010-0831

CVE-2010-0831 is a medium-severity vulnerability in Matthias Klose Fastjar with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.8)
• EPSS exploit prediction: 4% (88th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-22
• Affected product: Matthias Klose Fastjar
• Published: 2010-06-18
• Last modified: 2026-06-16

Description

Directory traversal vulnerability in the extract_jar function in jartool.c in FastJar 0.98 allows remote attackers to create or overwrite arbitrary files via a .. (dot dot) in a non-initial pathname component in a filename within a .jar archive, a related issue to CVE-2005-1080. NOTE: this vulnerability exists because of an incomplete fix for CVE-2006-3619.

Frequently asked questions

What is CVE-2010-0831?

Directory traversal vulnerability in the extract_jar function in jartool.c in FastJar 0.98 allows remote attackers to create or overwrite arbitrary files via a .. (dot dot) in a non-initial pathname component in a filename within a .jar archive, a related issue to CVE-2005-1080. NOTE: this vulnerability exists because of an incomplete fix for CVE-2006-3619.

How severe is CVE-2010-0831?

CVE-2010-0831 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2010-0831 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0831?

CVE-2010-0831 affects Matthias Klose Fastjar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-0831?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-0831 published?

CVE-2010-0831 was published on 2010-06-18 and last updated on 2026-06-16.

References

• http://marc.info/?l=oss-security&m=127602564508766&w=2
• http://marc.info/?l=oss-security&m=127602731712034&w=2
• http://marc.info/?l=oss-security&m=127603032617644&w=2
• http://packages.debian.org/changelogs/pool/main/f/fastjar/fastjar_0.98-3/changelog
• http://secunia.com/advisories/42892
• http://secunia.com/advisories/50786
• http://security.gentoo.org/glsa/glsa-201209-21.xml
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:122
• http://www.osvdb.org/65467
• http://www.redhat.com/support/errata/RHSA-2011-0025.html
• http://www.securityfocus.com/bid/41006
• http://www.vupen.com/english/advisories/2010/1553
• http://www.vupen.com/english/advisories/2011/0121
• https://bugzilla.redhat.com/show_bug.cgi?id=594497
• https://bugzilla.redhat.com/show_bug.cgi?id=601823
• https://launchpad.net/bugs/540575

Affected products (1)

• cpe:2.3:a:matthias_klose:fastjar:0.98:*:*:*:*:*:*:*

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