CVE-2011-1487
Description
The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Perl 5.x - 'lc()' / 'uc()' TAINT Mode Protection Security Bypass
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.10.1-20 |
| sid | Fixed | 5.10.1-20 |
| forky | Fixed | 5.10.1-20 |
| bullseye | Fixed | 5.10.1-20 |
| bookworm | Fixed | 5.10.1-20 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| perl | perl | 5.10.0 | |
| perl | perl | 5.10.1 | |
| perl | perl | 5.13.0 | |
| perl | perl | 5.13.1 | |
| perl | perl | 5.13.2 | |
| perl | perl | 5.13.3 | |
| perl | perl | 5.13.4 | |
| perl | perl | 5.13.5 | |
| perl | perl | 5.13.6 | |
| perl | perl | 5.13.7 | |
| perl | perl | 5.13.8 | |
| perl | perl | 5.13.9 | |
| perl | perl | 5.13.10 | |
| perl | perl | 5.13.11 | |
| perl | perl | 5.11.0 | |
| perl | perl | 5.11.1 | |
| perl | perl | 5.11.2 | |
| perl | perl | 5.11.3 | |
| perl | perl | 5.11.4 | |
| perl | perl | 5.11.5 | |
| perl | perl | 5.12.0 | |
| perl | perl | 5.12.1 | |
| perl | perl | 5.12.2 | |
| perl | perl | 5.12.3 | |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057891.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057971.html
- http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
- http://openwall.com/lists/oss-security/2011/04/01/3
- http://openwall.com/lists/oss-security/2011/04/04/35
- http://perl5.git.perl.org/perl.git/commit/539689e74a3bcb04d29e4cd9396de91a81045b99
- http://rt.perl.org/rt3/Public/Bug/Display.html?id=87336
- http://secunia.com/advisories/43921
- http://secunia.com/advisories/44168
- http://www.debian.org/security/2011/dsa-2265
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:091
- http://www.securityfocus.com/bid/47124
- https://bugzilla.redhat.com/show_bug.cgi?id=692844
- https://bugzilla.redhat.com/show_bug.cgi?id=692898
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66528
- https://security-tracker.debian.org/tracker/CVE-2011-1487
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.