CVE-2021-45960

Summary

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/libexpat/libexpat/issues/531
• https://github.com/libexpat/libexpat/pull/534
• https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
• http://www.openwall.com/lists/oss-security/2022/01/17/3
• https://security.netapp.com/advisory/ntap-20220121-0004/
• https://www.tenable.com/security/tns-2022-05
• https://www.debian.org/security/2022/dsa-5073
• https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
• https://security.gentoo.org/glsa/202209-24

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

• https://github.com/libexpat/libexpat/issues/531
• https://github.com/libexpat/libexpat/pull/534
• https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
• http://www.openwall.com/lists/oss-security/2022/01/17/3
• https://security.netapp.com/advisory/ntap-20220121-0004/
• https://www.tenable.com/security/tns-2022-05
• https://www.debian.org/security/2022/dsa-5073
• https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
• https://security.gentoo.org/glsa/202209-24

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