Zlibc Environment Variable Handling Local Privilege Escalation Vulnerability


A vulnerability exists in Zlibc that allows a local attacker to execute arbitrary code with elevated privileges through manipulation of the LD_ZLIB_CONFFILE and LD_ZLIB_UNCOMPRESSOR environment variables when calling setuid binaries.

Vulnerability Identifiers

  • Exodus Intelligence: EIP-1a8a439f

Vulnerability Metrics

  • CVSSv2 Score: 6.6

Vendor References

Discovery Credit

  • Exodus Intelligence

Disclosure Timeline

  • Disclosed to affected vendor: January 5th, 2022
  • Disclosed to public: February 2nd, 2022

Further Information

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