CVE-2019-9791
28Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendepss 20%
from disclosure to weapon0 days
Published on NVDApr 26
1st PoCMar 26
exploitation probability
20%top 3% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
public PoCs found — 2✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/46613githubgithub.com/Sp0pielar/CVE-2019-9791★ 2⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/errata/RHSA-2019:0966https://access.redhat.com/errata/RHSA-2019:1144https://bugzilla.mozilla.org/show_bug.cgi?id=1530958https://www.mozilla.org/security/advisories/mfsa2019-07/https://www.mozilla.org/security/advisories/mfsa2019-08/https://www.mozilla.org/security/advisories/mfsa2019-11/