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    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.

    Published:Jun 22, 2013
    Last Modified:Apr 11, 2025
    EPS:Jul 31, 2013
    EPSS Score:0.10376
    CVSS Score:6.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Haxx
    Product
    Curl
    Vendor
    Haxx
    Product
    Libcurl
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://github.com/bagder/curl/commit/192c4f788d48f82c03e9cef40013f34370e90737https://github.com/bagder/curl/commit/192c4f788d48f82c03e9cef40013f34370e90737

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High