Fix: Potential Vulnerability in bzip2 Library #1370
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nSelectors is used in a loop from 0 to nSelectors to access selectorMtf which is UChar selectorMtf[BZ_MAX_SELECTORS]; so if nSelectors is bigger than BZ_MAX_SELECTORS it'll do an invalid memory access Fixes out of bounds access discovered while fuzzying karchive
ket395
reviewed
Feb 20, 2025
| @@ -9,3 +9,6 @@ ORIGIN | |||
| Author: Mark Wielaard <[email protected]> | |||
| Date: Sat Jul 13 17:17:58 2019 +0200 | |||
| Prepare for 1.0.8 release. | |||
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| local vulnerability fix: | |||
| - Fix CVE-2019-12900 | |||
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This PR fixes a security vulnerability in inflate() that was cloned from zlib but did not receive the security patch applied in zlib. The original issue was reported and fixed under https://gitlab.com/federicomenaquintero/bzip2/-/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc.
This PR applies the same patch as the one in zlib to eliminate the vulnerability.
References
https://nvd.nist.gov/vuln/detail/CVE-2019-12900
https://gitlab.com/federicomenaquintero/bzip2/-/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc