CVE-2013-2174

CVE-2013-2174 is a medium-severity vulnerability in Redhat Enterprise Linux with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 11% (95th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Redhat Enterprise Linux
• Published: 2013-07-31
• Last modified: 2026-06-16

Description

Heap-based buffer overflow in the curl_easy_unescape function in lib/escape.c in cURL and libcurl 7.7 through 7.30.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted string ending in a "%" (percent) character.

Frequently asked questions

What is CVE-2013-2174?

Heap-based buffer overflow in the curl_easy_unescape function in lib/escape.c in cURL and libcurl 7.7 through 7.30.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted string ending in a "%" (percent) character.

How severe is CVE-2013-2174?

CVE-2013-2174 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-2174 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2174?

CVE-2013-2174 primarily affects Redhat Enterprise Linux. In total, 169 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2174?

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

When was CVE-2013-2174 published?

CVE-2013-2174 was published on 2013-07-31 and last updated on 2026-06-16.

References

• http://curl.haxx.se/docs/adv_20130622.html
• http://lists.opensuse.org/opensuse-updates/2013-07/msg00013.html
• http://rhn.redhat.com/errata/RHSA-2013-0983.html
• http://www.debian.org/security/2013/dsa-2713
• http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
• http://www.securityfocus.com/bid/60737
• http://www.ubuntu.com/usn/USN-1894-1
• https://github.com/bagder/curl/commit/192c4f788d48f82c03e9cef40013f34370e90737

Affected products (169)

• cpe:2.3:a:haxx:curl:7.7:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.8:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.3:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.4:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.5:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.6:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.7:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.9.8:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.3:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.4:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.5:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.6:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.7:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.10.8:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.11.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.11.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.12.0:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.12.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.12.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.12.3:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.13.0:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.13.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.13.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.14.0:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.14.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.15.0:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.15.1:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.15.2:*:*:*:*:*:*:*
• cpe:2.3:a:haxx:curl:7.15.3:*:*:*:*:*:*:*

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