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    CVE-2016-0755

    The ConnectionExists function in lib/url.c in libcurl before 7.47.0 does not properly re-use NTLM-authenticated proxy connections, which might allow remote attackers to authenticate as other users via a request, a similar issue to CVE-2014-0015.

    Published:Jan 27, 2016
    Last Modified:Apr 12, 2025
    EPS:Jan 29, 2016
    EPSS Score:0.00864
    CVSS Score:7.3

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Haxx
    Product
    Curl

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

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    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…
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    References

    http://curl.haxx.se/docs/adv_20160127A.html
    http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176546.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177342.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177383.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176413.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00031.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00044.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00047.html
    http://packetstormsecurity.com/files/135695/Slackware-Security-Advisory-curl-Updates.html
    http://www.debian.org/security/2016/dsa-3455
    http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
    http://www.securityfocus.com/bid/82307
    http://www.securitytracker.com/id/1034882
    http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.519965
    http://www.ubuntu.com/usn/USN-2882-1
    https://security.gentoo.org/glsa/201701-47
    https://support.apple.com/HT207170
    http://curl.haxx.se/docs/adv_20160127A.html
    http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176546.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177342.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177383.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176413.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00031.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00044.html
    http://lists.opensuse.org/opensuse-updates/2016-02/msg00047.html
    http://packetstormsecurity.com/files/135695/Slackware-Security-Advisory-curl-Updates.html
    http://www.debian.org/security/2016/dsa-3455
    http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
    http://www.securityfocus.com/bid/82307
    http://www.securitytracker.com/id/1034882
    http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.519965
    http://www.ubuntu.com/usn/USN-2882-1
    https://security.gentoo.org/glsa/201701-47
    https://support.apple.com/HT207170

    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