CVE-2024-12084

Summary

A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.

Affected Software

VendorProductVersion RangeStatus
3.2.7affected
3.3.0affected
Red HatRed Hat Enterprise Linux 100:3.4.1-2.el10 < *unaffected

Weaknesses

  • CWE-122: Heap-based Buffer Overflow

Workarounds

Red Hat recommends filtering untrusted connections to Rsync via firewall rules on the host and on network firewall appliances.

Additionally, systems which only need to provide remote Rsync access to users with known identities can enable authentication using the auth users parameter in their rsyncd configuration file (rsyncd.conf).

Systems that provide anonymous read access to hosted files via Rsync, such as mirror hosts, do not have reasonable mitigation options available. We strongly urge operators using vulnerable versions of Rsync to update as soon as possible.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: yes
    • Technical Impact: total

Additional References

CVE Program Container

Additional References

References