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Mallory
HighPublic exploit

Out-of-bounds access in libarchive RAR parser

IdentifiersCVE-2024-48958CWE-125· Out-of-bounds Read

CVE-2024-48958 is an out-of-bounds access vulnerability in libarchive, specifically in the execute_filter_delta function in archive_read_support_format_rar.c in versions before 3.7.5. When libarchive processes a crafted RAR archive, incorrect bounds handling can allow the src pointer to move beyond dst, resulting in an out-of-bounds memory access during archive parsing. The issue is triggered by malicious archive content and affects software that relies on vulnerable libarchive code for handling RAR files.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

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

Successful exploitation can cause a crash or other abnormal process behavior due to invalid memory access while parsing a malicious RAR archive. Depending on the consuming application and runtime conditions, the bug may also expose process memory contents or contribute to further memory corruption impacts. The provided content identifies it as an out-of-bounds access issue in file parsing logic.

Mitigation

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

Until patches can be applied, avoid processing untrusted or externally supplied RAR archives with software linked against vulnerable libarchive versions. Disable RAR handling where feasible, isolate archive-processing workflows in sandboxes or low-privilege contexts, and use file-type filtering or content inspection to reduce exposure to malicious archive files.

Remediation

Patch, then assume compromise.

Upgrade libarchive to version 3.7.5 or later, where the vulnerability is fixed. For downstream products that bundle or statically link libarchive, apply the vendor-provided security update that incorporates the patched libarchive version. Apple indicates this issue was addressed in its affected products through security updates that include the upstream fix.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType
LibarchiveLibarchiveapplication

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Detection signatures

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Social activity4

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