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Vulnerability record · CVE-2013-2174 · published 31 July 2013

CVE-2013-2174: Haxx curl memory buffer overflow vulnerability

Haxx · Curl

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.

6.8 CVSS 2.0 Medium EPSS 11% · top 4.3% CWE-119 · Memory buffer overflow
6.8CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
18References, 2 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://curl.haxx.se/docs/adv_20130622.html Vendor Advisory
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 ExploitPatch
http://curl.haxx.se/docs/adv_20130622.html Vendor Advisory
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 ExploitPatch

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Source: NIST National Vulnerability Database (record CVE-2013-2174), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.