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Mallory
MediumCISA KEVExploited in the wildPublic exploit

Internet Explorer ASLR Bypass Vulnerability

IdentifiersCVE-2015-0071CWE-693

CVE-2015-0071 is a security feature bypass in Microsoft Internet Explorer 9 through 11 that allows a remote attacker to defeat Address Space Layout Randomization (ASLR) via a crafted website. Microsoft identified it as an Internet Explorer ASLR bypass vulnerability and stated it was exploited in the wild. The issue does not itself constitute a standalone remote code execution flaw; rather, it weakens Internet Explorer’s memory-randomization protections and can be used in exploit chains to make reliable exploitation of a separate memory corruption or code execution vulnerability easier.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to bypass ASLR protections in the target Internet Explorer process, reducing exploit mitigations and increasing the reliability of a chained exploit. By itself, the vulnerability is a security feature bypass rather than direct code execution, but in combination with another vulnerability it can materially aid compromise of the affected system. The provided context notes it was exploited in the wild and reportedly chained with an Adobe Flash remote code execution vulnerability in attacks against visitors to the Forbes website.

Mitigation

If you can’t patch tonight, do this now.

No vulnerability-specific workaround or mitigating factor for this ASLR bypass is provided in the supplied content. General exposure reduction measures supported by the content include limiting browsing to untrusted content, reducing user privileges to limit post-exploitation impact, and on Windows Server systems relying in part on Internet Explorer Enhanced Security Configuration to reduce exposure to specially crafted web content. These measures do not remediate the flaw and patching is the primary mitigation.

Remediation

Patch, then assume compromise.

Apply Microsoft Security Update 3034682 for the affected Internet Explorer versions. The bulletin states that for Internet Explorer 9, 10, and 11, both update 3021952 and update 3034196 are required for full protection. Microsoft also noted installation-order requirements for manual deployment: update 3021952 should be installed before 3034196. On some platforms, installing 3021952 also installs related updates such as 3023607 and 3036197 automatically.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationInternet Explorerapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures2

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.