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CVE-2013-1055

MEDIUMCVSS 4.3/10EPSS 1.27%

Last modified

CVE-2013-1055 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. The unity-firefox-extension package could be tricked into dropping a C callback which was still in use, which Firefox would then free, causing Firefox to crash. This could be achieved by adding an action to the launcher and updating it with new callbacks until the libunity-webapps rate limit was hit. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

The unity-firefox-extension package could be tricked into dropping a C callback which was still in use, which Firefox would then free, causing Firefox to crash. This could be achieved by adding an action to the launcher and updating it with new callbacks until the libunity-webapps rate limit was hit. Fixed in 3.0.0+14.04.20140416-0ubuntu1.14.04.1 of unity-firefox-extension and in all versions of libunity-webapps by shipping an empty unity-firefox-extension package, thus disabling the extension entirely and invalidating the attack against the libunity-webapps package.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS Probability
1.27%

66.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CanonicalUnity-Firefox-Extension< 3.0.0\+14.04.20140416-0ubuntu1.14.04.1
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux15.04

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2013-1055?
The unity-firefox-extension package could be tricked into dropping a C callback which was still in use, which Firefox would then free, causing Firefox to crash. This could be achieved by adding an action to the launcher and updating it with new callbacks until the libunity-webapps rate limit was hit. Fixed in 3.0.0+14.04.20140416-0ubuntu1.14.04.1 of unity-firefox-extension and in all versions of libunity-webapps by shipping an empty unity-firefox-extension package, thus disabling the extension entirely and invalidating the attack against the libunity-webapps package.
How severe is CVE-2013-1055?
CVE-2013-1055 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.
How do I fix CVE-2013-1055?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST