CVE-2019-9792
28Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendepss 13%
from disclosure to weapon33 days
Published on NVDApr 26
1st PoC+33d
exploitation probability
13%top 4% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially 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/46939cve_referencepacketstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.htmlunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.htmlhttps://access.redhat.com/errata/RHSA-2019:0966https://access.redhat.com/errata/RHSA-2019:1144https://bugzilla.mozilla.org/show_bug.cgi?id=1532599https://www.mozilla.org/security/advisories/mfsa2019-07/https://www.mozilla.org/security/advisories/mfsa2019-08/https://www.mozilla.org/security/advisories/mfsa2019-11/