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    CVE-2015-5523

    The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, which triggers a large memory allocation.

    Published:Jun 3, 2015
    Last Modified:Apr 12, 2025
    EPS:Aug 11, 2015
    EPSS Score:0.04271
    CVSS Score:4.3

    Affected Products

    Vendor
    Apple
    Product
    Iphone Os
    Vendor
    Apple
    Product
    Mac Os X
    Vendor
    Apple
    Product
    Watchos
    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Htacg
    Product
    Tidy

    Exploits

    http://www.openwall.com/lists/oss-security/2015/06/04/2http://www.openwall.com/lists/oss-security/2015/07/13/7https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501http://www.openwall.com/lists/oss-security/2015/06/04/2http://www.openwall.com/lists/oss-security/2015/07/13/7https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501

    Related CVEs

    CVE-2026-87545 (CVSS 6.5) — Information leak in Mobile in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker leverag…
    CVE-2026-87609 (CVSS 9.6) — Use after free in Sharing in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker to execu…
    CVE-2026-87518 (CVSS 5.3) — Observable discrepancy in Safebrowsing in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote atta…
    CVE-2026-87482 (CVSS 5.9) — Cleartext transmission of sensitive data in HttpsUpgrades in Google Chrome on on iOS prior to 153.0.8010.36 al…
    CVE-2026-87517 (CVSS 3.1) — Race condition in Mobile in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker leveragin…
    CVE-2026-85047 (CVSS 9.6) — Improper input validation in Transactions Platform in Google Chrome on on iOS prior to 152.0.7977.82 allowed a…
    CVE-2026-78964 (CVSS 9.6) — Use after free in Sync in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentia…
    CVE-2026-78957 (CVSS 5.5) — Information leak in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a local attacker to obtai…
    CVE-2026-78981 (CVSS 6.5) — Information leak in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a local attacker to poten…
    CVE-2026-79105 (CVSS 4.3) — Improper input validation in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacke…

    References

    http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
    http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html
    http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
    http://www.debian.org/security/2015/dsa-3309
    http://www.openwall.com/lists/oss-security/2015/06/04/2
    http://www.openwall.com/lists/oss-security/2015/07/13/7
    http://www.openwall.com/lists/oss-security/2015/07/15/3
    http://www.securityfocus.com/bid/75037
    http://www.securitytracker.com/id/1033703
    http://www.ubuntu.com/usn/USN-2695-1
    https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501
    https://support.apple.com/HT205212
    https://support.apple.com/HT205213
    https://support.apple.com/HT205267
    http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html
    http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html
    http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
    http://www.debian.org/security/2015/dsa-3309
    http://www.openwall.com/lists/oss-security/2015/06/04/2
    http://www.openwall.com/lists/oss-security/2015/07/13/7
    http://www.openwall.com/lists/oss-security/2015/07/15/3
    http://www.securityfocus.com/bid/75037
    http://www.securitytracker.com/id/1033703
    http://www.ubuntu.com/usn/USN-2695-1
    https://github.com/htacg/tidy-html5/issues/217#issuecomment-108565501
    https://support.apple.com/HT205212
    https://support.apple.com/HT205213
    https://support.apple.com/HT205267

    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