Stack overflow in libxml2
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.10.0, 2.12.7+dfsg+really2.9.14-0.4ubuntu0.3, 2.9.14+dfsg-1.3ubuntu3.5, 2.9.13+dfsg-1ubuntu0.9, 2.9.10+dfsg-5ubuntu0.20.04.10+esm2, and 3 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Uncontrolled recursion in XPath evaluation in libxml2 up to and including version 2.9.14 allows a local attacker to cause a stack overflow via crafted expressions. XPath processing functions `xmlXPathRunEval`, `xmlXPathCtxtCompile`, and `xmlXPathEvalExpr` were resetting recursion depth to zero before making potentially recursive calls. When such functions were called recursively this could allow for uncontrolled recursion and lead to a stack overflow. These functions now preserve recursion depth across recursive calls, allowing recursion depth to be controlled.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- libxml2
fixed in 2.10.0; fixed in 2.12.7+dfsg+really2.9.14-0.4ubuntu0.3; fixed in 2.9.14+dfsg-1.3ubuntu3.5; fixed in 2.9.13+dfsg-1ubuntu0.9; fixed in 2.9.10+dfsg-5ubuntu0.20.04.10+esm2; fixed in 2.9.4+dfsg1-6.1ubuntu1.9+esm5; fixed in 2.9.3+dfsg1-1ubuntu0.7+esm10; fixed in 2.9.1+dfsg1-3ubuntu4.13+esm9