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Test your applicationsUpgrade RHEL:8
python27:2.7/python2-pygments
to version 0:2.2.0-22.module+el8.5.0+10788+a4cea9e0 or higher.
This issue was patched in RHSA-2021:4151
.
Note: Versions mentioned in the description apply only to the upstream python27:2.7/python2-pygments
package and not the python27:2.7/python2-pygments
package as distributed by RHEL
.
See How to fix?
for RHEL:8
relevant fixed versions and status.
In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.